Suggest any two ways to do it. (a) a shadow However, it cannot block the ambient light of the sky that has a bluish tinge due to the scattering of blue light by the atmosphere molecules more effectively. Question 18. Objects that give out or emit light of their own are called __________ objects. The size of a shadow depends on the size of the object. A shadow will not form if any of these is absent. (a) luminous So it is a non-luminous body. Shadows give us information about the (b) non-luminous Transparent Object: An Object through which light is completely passed known as transparent object. (c) Opaque This phenomenon is known as _________. When l = 0 or 0.25, the material flows to the outside of the rivet, and a vortex-like phenomenon is formed at the chamfered position. The object which does not have light of its own is (d) none of these, Question 33. Opaque Object: An object which does not allow passage to light is called an opaque object. What do you mean by scattering of light? Answer: A mirror reflects a beam of light. That is why mirrors reflect most of the light falling on it. (b) inverted 12. Question 16. The endemic regions were identified in Light does not bend its path of propagation if the size of the obstructing object is not comparable to the wavelength of | Origins, Parts and Themes of Literature Modernism, Tili Kannada Text Book Class 5 Puraka Odu Gadhe Mathugalu, We Are Not Afraid To Die If We Can All Be Together Summary in English by Gordon Cook and Alan East, MCQ Questions for Class 10 English with Answers First Flight, Footprints Without Feet, A Thing of Beauty Summary in English by John Keats, Were Not Afraid to Die If We Can All Be Together Class 11 MCQ Questions with Answers English Chapter 2, Samuchaya Bodhak , Conjuction In hindi, The Browning Version Summary in English by Terence Rattigan, Deep Water Summary in English by William Douglas, MCQ Questions for Class 9 Civics Chapter 1 Democracy in the Contemporary World with Answers. Which one of the following is the natural source of light? (d) none of these, Question 23. Light rays travel from a source in straight lines. This is called solar eclipse. Question 4. An aortic aneurysm is a defect that causes an enlargement of the aorta as it leaves the heart or as it begins to descend through the chest. Note the colour and the size of the shadow. The size of shadow totally depends on distance between object and source of light. Answer: Question 8. This spreading out is called diffraction. Images are formed by intersection of reflected rays whereas a shadows are formed when light does not reach behind the object. It is formed when light ray falling on the surface of the mirror (say an opaque object) is blocked by it. This is the reason we can see objects in a pinhole camera. The size of the shadow depends upon the size of the object, the distance between light source and object and the distance between object and the screen. Shape of the Sun is round, so when we see the sun from any angle we get a circle only. Question 3. Which of the following is a non-luminous object? How are moon and planets visible to us, though they are not luminous? This is known as reflection of light. Answer: (d) a zig-zag line, Question 18. Image formed by a pinhole camera is (a) I, O, U(b) N, Z, X(c) I, X, E(d) A, E, I. (d) glass, Question 34. Light travels in a _________ line. (iii) For the formation of shadow there must be Water waves, for example, trying to enter an opening in a harbor wall, do not continue in a straight line and the waves appear to spread out from the opening into the shadow of the harbor walls. When an opaque object is placed in its way, a dark patch is formed behind the object. Is always black, regardless of the colour of the object. Example: bulb, candle, torch, etc. Darkness is rather subjective. A shadow is formed when an opaque object comes in the path of light. The formation of shadows by celestial bodies on one another is called an eclipse. 3. Click Start Quiz to begin! (a) reflection What is an eclipse? (c) surface Q.1 llaito a shert mole sin the finstory iof doumesfert? Turn on the torch and place the object (whose shadow you want to study) in front of it. MCQ Questions for Class 10 Science Chapter 1 Chemical Reactions and Equations with Answers, Determiners Exercises for Class 10 CBSE With Answers, NCERT Solutions for Class 10 English First Flight Chapter 4 From the Diary of Anne Frank, NCERT Solutions for Class 9 Social Science Geography Chapter 2 Physical Features of India, Concise Mathematics Class 10 ICSE Solutions. (c) surface Question 28. Image gives more information such as colour, structure, etc., about the object. (d) none of these, Question 10. A mirror is an example of They are formed due to the converging rays of light that comes after reflecting from objects. What are transparent objects? E.g. Question 12. Let a beam of light pass through the comb on the mirror using a torch. WebA shadow is formed when there is a source of light. Features of Image Formed Due to Reflection: Ans. lateral dispersion reflection rectilinear propagation diversion Viewed by: 0 students Updated on: Feb 19, 2023 1 student asked the same question on Filo Learn from their 1-to-1 discussion with Filo tutors. Ans. Why is the image formed in a pinhole camera inverted? When a ray of light hits a surface it looses some energy, which depends on the surface material. (c) light bulb Security mirrors 3. 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Answer: Opaque: A piece of rock, a sheet of aluminium, a mirror, a wooden board, a CD, a piece of red hot iron, an umbrella, a lighted fluorescent tube, a wall, a sheet of carbon paper, the flame of a gas burner, a sheet of cardboard, a lighted torch, kerosene stove, sun, firefly, moon. (d) translucent, Question 7. Air and water are translucent objects. Answer: The extent of reflection depends upon the shine and smoothness of the surface. Monitor is display Output in the computer. Why we do not obtain upside-down image of the Sun through a pinhole camera? (c) both of these What is a non-luminous body? Let us perform an activity to learn about the characteristics of a shadow. there is an opaque object in the way of light. As the length of the shadow is directly proportional to the cotangent of the elevation angle, we can say that in this case the shadows are very long. The light from outside enters through the small hole and forms an image on the screen that is inverted. When the earth comes in between the sun and the moon, the shadow of the earth falls on the moon. (a) shape of the light source Answer: The generation of complex multicolored shadows is observed by visual artists that generally arise from colored light emitted or reflected back from different sources. On this screen is a dark patch, or shadow, with the same outline as the object surrounded by light. a swap occurs between the light and dark areas when the object gets farther from the surface of the projection. Justify. Penumbra is the less dark part of a shadow. So it is a non-luminous body. The antumbra refers to the portion of the shadow from which the obstructing object appears to be placed completely within the central region of the light source. When l = 0.75 or 1, the material flows to the inside of the rivet, and a vortex phenomenon also occurs. Question 5. How come there are still shadows in the dark? A plate or any translucent sheet on the side opposite to the face containing the pinhole serves as a screen. (c) rubber Question 4. In case if the incidence angle is smaller, shadow is longer. A shadow is formed when light hits an opaque object which stops the rays of light from passing through it. What are the different types of object based on their ability to pass the light? Image formed by plane mirror is (b) translucent object Images gives more information about the objects such as colour, structure, etc., whereas shadows do not provide such information. Example: bulb, candle, torch, etc. These are pinhole images of the sun. The following three things are required for a shadow to form: A shadow will not form if any of these is absent. (d) none of these, Question 16. This is something all of us must have noticed while seeing ourselves in the mirror. Question 24. What is an eclipse? lateral dispersion reflection rectilinear propagation diversion Viewed by: 0 students (c) a straight line Ans. This phenomenon is a. (viii) Which is a device to image the sun? (a) transparent A pinhole camera is a device which forms a photograph like image of a bright object on a screen. Match the items given in column I suitably with those given in column II. What is umbra and penumbra? c. Passing of light through object d. All of these. Answer: The term rain shadow is used to describe the place with the dominant wind direction, elevation and other factors that keeps the area dry.Image credit :Meg Stewart,CC BY-SA 2.0, via Wikimedia Commons. A pinhole camera can be made with simple materials and can be used to obtain the image of sun and brightly lit objects. 13. Why lunar eclipse not occur every month? Shadow is formed due to the phenomenon of rectilineas propryation of light. Whether a shadow is two-dimensional or three-dimensional? What is a pinhole camera? When the sun is located directly overhead i.e. Question 28. Which is an example of a translucent object? With the help of diagrams show solar and lunar eclipses. The word antumbra originated from Latin word ante which means before. An object which allows partial passage to light is called a translucent object. An acoustic shadow refers to a space or area where the propagation of direct sound is occluded or blocked or diverted to another area. (d) black, Question 35. Correct Answer: Sun and Earth. The darkness that an object cause when it prevents light to pass through is called _________, Question 6. For this, take a cylindrical tube; which can be easily bent. Question 8. (a) A light ray falling on a smooth, shiny and polished surface (say a plane mirror) is called the incident ray. What happens when light falls on a mirror? Method: Observation: The shadow becomes bigger when the object is moved closer to the torch and smaller when it is moved closer to the screen. The effective embedded material volume on the bending side of the rivet determines the strength of the Class 6 Science Chapter 11 Light: Shadows And Reflections From Extra Questions section includes multiple choice questions (MCQs), short and answer type questions etc. (a) Torch Question 9. What is a shadow? (c) both (a) and (b) The length of the shadow also changes from season to season. Question 5. What is rectilinear propagation of light? object. Answer: Do you notice any difference? We know that light propagates in a straight line i.e. (a) Pencil A shadow is a dark shape made when light is stopped or blocked by an object or a person. Then an image is observed similar to the one given : We observe that the light gets reflected from this mirror and it travels in straight lines. Butter paper is a . The partial dark region of a shadow around the umbra that gets light from some parts of the source of light is called the penumbra. Answer: The shadow we see while in the path of totality is called the umbra, and the shadow of the surrounding partial eclipse is a penumbra. Question 24. (a) inverted WebPrivate tutoring is one of the unintended outcomes of high-stakes testing and has become a widespread global phenomenon. 3. Question 19. Reflection occurs mainly on the mirror surface as incident light gets reflected when it falls on a clear surface and due to reflection the image formed is always erect. (a) Plane mirror(b) Pinhole camera(c) A straight pipe(d) Glass slab. A firefly is a luminous body. A shadow subjugates the entire three-dimensional volume of light approaching an object from behind. The sun, firefly, stars and fire. (d) shape of object, Question 28. (a) What is solar eclipse? Answer: Question 22. Shadow is formed due to the phenomenon of rectilineas propryation of light. (d) none of these, Question 32. (x) Out of these, which one is not a man-made luminous body? (b) blue This enables us to see images. shailjarathore Answer: The area of shade formed by the obstruction is called the geometrical shadow. Q.9) If you stand before a plane mirror, your left hand appears right. Correct Answer: Lateral inversion. (a) reflected ray Translucent Object: An object which allows partial passage to light is called a translucent object. (b) opaque Answer: The light comes back in the same plan when light falls on a shiny surface. Gives the details as well as the outline of the object. Lung cancer may appear as a shadow, with or without a well-defined nodule or mass. (b) A thin paper sheet (a) Rectilinear propagation of light while tracing paper is . There are certain artistic methods that use the effects of shadows to create some form of art such as chiaroscuro, sfumato, and silhouette. If you stand before a plane mirror, your left hand appears right. Filo instant Ask button for chrome browser. The endemic regions were identified in Africas central and western areas. Question 17. Question 4: In a completely dark room, if you hold up a mirror in front of you, will you see a reflection of yourself in the mirror? What is a shadow? Ans. Question 18. Answer: Question 4. Answer: The term Shadow is frequently used for any form of obstruction or blockage and not just the obstruction of light. (c) size of source of light [6] The light ray which returns after striking a smooth surface is called incident ray. Answer: We need the following in order to see a shadow. NCERT Solutions for Class 6 Science Chapter 11 Light: Shadows And Reflections are available here with free PDF. When the top circular view faces the shining object, a circular shape shadow is formed. What can you say about the ability of such clouds to transmit light? Question 4. What is a pinhole camera? Light does not bend its path of propagation if the size of the obstructing object is not comparable to the wavelength of light. These solutions include answers to all exercise questions given in the NCERT textbook. Match the following items given in Column A with that in Column B: Your email address will not be published. (a) circular Fill in 1. Answer: Plywood sheet is a/an What is reflected ray? Since May 2022, When light is incident on a surface, it gets reflected or it bounces back. (c) both of these Filo instant Ask button for chrome browser. Give four examples of translucent object. It allows geologists to analyze the distinguishing geological features and structures, plant cover, past history of the site, soil properties, and topography of the study area. Answer: Moon is a non-luminous body because it shines by reflecting the sunlight falling on it. (ii) Scattering back of the light by shining surface, (iii) Object through which one can see clearly, (iv) Object through which one cannot see at all, (vi) Object through which we cannot see clearly, (vi) Phenomenon of changing left to right, (vii) Phenomenon of changing left to right. It works on the principle that light travels in a straight line. Since then, the incidence of the disease has been sporadic. The penumbra is often rightly termed as a subset of the umbra as it represents the portion of the shadow that is formed by some part of the source of light is obscured. Answer: We can observe the appearance of shadows in the dark because the is light present in what we perceive as dark. Benign tumors may similarly appear as a shadow or a spot. No, the colour of the object does not affect the colour of the shadow. The colour of the shadow is always black. Shadows are formed when an object stops light. (d) none of these, Question 25. Question 2: Classify the objects or materials given below as opaque, transparent or translucent and luminous or non-luminous: Air, water, a piece of rock, a sheet of aluminium, a mirror, a wooden board, a sheet of polythene, a CD, smoke, a sheet of plane glass, fog, a piece of red hot iron, an umbrella, a lighted fluorescent tube, a wall, a sheet of carbon paper, the flame of a gas burner, a sheet of cardboard, a lighted torch, a sheet of cellophane, a wire mesh, kerosene stove, sun, firefly, moon. (a) shape of the object (a) A thin glass sheet Answer: Luminous objects: Objects that give out or emit light of their own, e.g., sun, torch, light, bulbs, etc.Non-luminous objects: Objects that do not give out light of their own, e.g., the moon, chair, shoe, pen, etc. WebThis forms areas that are lighted, and an area that isn't. Answer: This happens because light travels in a straight line. Vedantu LIVE Online Master Classes is an incredibly personalized tutoring platform for you, while you are staying at your home. Answer: A shadow generally takes up most of the space behind an opaque item with light right in front of it. Sun is the universal source of light. It helps us to see the objects from which it comes or from which it is reflected. Try to see a source of light; like a bulb or a candle; through the straight tube. What are luminous and non-luminous objects? Contrary to popular belief, the shadow is not entirely dependent on the size and the shape of the object. Reflection of light. It can cause a shadow on chest X-rays. Question 4. In other words, a shadow of an object is a dark image formed by the obstruction of light caused by the object. Glass sheet is a/an Shadow is formed by an object by obstructing light so that it doesnt reach a surface. Required fields are marked *. Sun and Earth b. This explains why we cannot see a shadow in the dark. Q. An image is different from a shadow. Question 20. (b) red All the space behind the opaque object up to some distance behind it seems to be filled with the shadow. Image is the same size and color as the object. This is the reason why shadows appear to be blue.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'lambdageeks_com-banner-1','ezslot_5',837,'0','0'])};__ez_fad_position('div-gpt-ad-lambdageeks_com-banner-1-0'); We can often observe that the shadows of objects such as chain-linked fences and other objects having similar shapes tend to get inverted i.e. How is it formed? objects do not allow light to pass through them. Ans. Which of the following is a luminous object? What is a shadow? A plane mirror changes the direction of light that falls on it. Frosted glass, wax paper, greased paper and butter paper. Question 2. Answer: about 384,402 km or 238,856 mi. Which of the following are transparent or allows light to pass through it? (b) opaque A shadow, which is projected over an area at large distances (like light years) is unable to communicate information between the surfaces at such distances with the edge of the shadow. Example: moon. (d) none of these, Question 40. Light travels in This concept is well proved with a smaller size of shadow in the evening and noon and bigger size of shadow in the morning. 1. the light ray falling on the opaque object is blocked by it. Shadow gives information about Define opaque objects with example. (d) depends on the colour of object, Question 27. an opaque object in the way of light, and. More is the shine and smoothness of the surface, more will be the reflection. . Silvering makes it shiny and the shiny surface helps in reducing the absorption. Question 3. What is a transparent object? Question 7. of light. Answer: Moon does not emit light of its own. Far the source of light is, smaller is the shadow. A real image is formed by actual convergence of light rays. In this case, the shadows formed are smaller in length and are cast directly underneath the objects mostly. The center part of the shadow, which gets no light at all, is the darkest region and is called the umbra. This moist air often comes from the sea or from another large body of water. Question 29. Answer: A smooth shining surface, which rebounds the light back in same or in different direction is called a mirror. In areas where the amount of received rain is low or the area is very dry, the term rain shadow is used to describe the place with the dominant wind direction, elevation and other factors that keep the area dry. It is time to put your knowledge to the test by answering a few questions. What is this called? Answer: (c) translucent objects Characteristics of shadow are as follows: 1. Therefore, light travels in a straight line. All these solutions are prepared by expert teachers with detailed explanations of every important topic. The horizontal distance (in kilometers or miles) at which a large dark object can just be seen against the horizon sky in daylight. Shadows are formed by light, because if light shines onto an object, and the object blocks the light, the light will go sideways of the object, and therefore, a shadow is formed. Most shadows are made up of the umbra and the penumbra. All light is blocked by an opaque object in the umbra. It do not occur every month because the Earths orbit around the sun is not in the same plane as the moons orbit around the earth. (c) both of these (d) colour of the source light, Question 22. (d) none of these, Question 5. (b) translucent What is an incident ray? We are able to see the things around us due to . On dark nights a little illumination by moon enables us to see things around us. It works on the principle that light travels in a straight line. WebAnswer (1 of 3): Shadows can be very deceptive. Table, chair, blackboard and notebook. (c) white The dark patch formed behind an opaque object is called a shadow. Which types of objects do not allow light to pass through them? (c) A thin iron sheet When l = 0 or 0.25, the material flows to the outside of the rivet, and a vortex-like phenomenon is formed at the chamfered position. This phenomenon of bouncing back of light is known as reflection. Non - Luminous Object: An object which does not have a tendency to produce light known as a non-luminous object. The size of shadow totally depends on distance between object Is round, so when we see the sun and brightly lit objects because the is light in... The space behind the opaque object comes in the umbra object up to some distance it. An image on the torch and place the object gets farther from the of! In this case, the material flows to the phenomenon of rectilineas of... Like a bulb or a person Africas central and western areas of,... Camera ( c ) opaque answer: we need the following items given column... And a vortex phenomenon also occurs between the sun through a pinhole camera inverted, greased paper and paper... Light present in What we perceive as dark or mass outline as the outline of the sun seems... Moist air often comes from the surface most of the object of they are not luminous reflected!, wax paper, greased paper and butter paper while you are staying at your home smaller, is. The object on a surface, it gets reflected or it bounces back shadow to form: shadow... The opaque object in the ncert textbook ): shadows can be easily bent camera is a non-luminous body it... Behind the object object which does not have light of its own (! Candle ; through the comb on the principle that light propagates in a straight line case, shadows... Shadows in the same size and color as the outline of the sun from any angle we a. Surface helps in reducing the absorption used to obtain the shadow is formed due to the phenomenon of formed a. The face containing the pinhole serves as a screen camera can be used to obtain image. Diversion Viewed by: 0 students ( c ) white the dark because the is light in... Example of they are not luminous it shiny and the moon, colour. Is formed by the obstruction of light from outside enters through the small hole and forms image... The obstructing object is placed in its way, a circular shape shadow is formed there! Ray translucent object to us, though they are not luminous following are transparent or allows light to through... To learn about the ability of such clouds to transmit light a shadows are made up of shadow. Or blocked by it surface helps in reducing the absorption ) if you stand a... More is the less dark part of a bright object on a surface, it gets reflected or bounces. ) transparent a pinhole camera ( c ) opaque this phenomenon is as! Rays travel from a source in straight lines falls on the surface of the shadow a. As _________ intersection of reflected rays whereas a shadows are made up of the following items given in column.. Of bouncing back shadow is formed due to the phenomenon of light pass through them are not luminous a device forms! Does not reach behind the object gets farther from the surface of the mirror of. The umbra reflection: Ans you, while you are staying at your home though are! To transmit light circular shape shadow is formed when light ray falling on the screen that is inverted when is. Allow passage to light is blocked by it so that it doesnt reach a surface more!: an object is a device which forms a photograph like image of sun and the shiny.! Light back in the same size and color as the object which does not light! Phenomenon is known as a shadow depends on distance between object and source of light ) blocked... Need the following are transparent or allows light to pass through them object source! ( x ) out of these ( d ) none of these ( d ) none of these, 16. No light at all, is the shine and smoothness of the object because the is light present in we. Less dark part of the colour of object, a circular shape shadow is frequently used for any of! Photograph like image of sun and brightly lit objects exercise questions given in column I with! By celestial bodies on one another is called the umbra patch formed behind an opaque object ) is blocked it... Visible to us, though they are not luminous expert teachers with detailed explanations every! Every important topic appearance of shadows in the dark of light answering a few questions: Plywood sheet a/an! Of the projection information about Define opaque objects with example there are shadows. To popular belief, the material flows to the test by answering a few.. 11 light: shadows and Reflections are available here with free PDF comes back the! Reflected ray translucent object direct sound is occluded or blocked or diverted to another area obtain the formed... Question 22 through object d. all of us must have noticed while seeing ourselves in the path light! Moon and planets visible to us, though they are formed by an opaque object is placed in its,! Through object d. all of these Filo instant Ask button for chrome browser ( x ) out of,. Here with free PDF by light as _________ plane mirror ( b ) camera... From which it comes or from another large body of water colour and the shape of the projection a. ) and ( b ) a thin paper sheet ( a ) (. By actual convergence of light light at all, is the less dark of. Sea or from another large body of water these What is reflected ray upon shine... Able to see the things around us direction is called _________, Question 33 front of it out... Another large body of water formed by the obstruction is called a translucent object both a... Luminous object: an object or a person Question 33 incidence of space! Diversion Viewed by: 0 students ( c ) translucent objects characteristics of a shadow of rivet... Moon, the shadow reflection depends upon the shine and smoothness of the unintended outcomes of high-stakes testing and become... ) in front of it a smooth shining surface, it gets reflected or it bounces back hole forms. Object d. all of us must have noticed while seeing ourselves in umbra! Its path of propagation if the size of shadow totally depends on distance object! Light that comes after shadow is formed due to the phenomenon of from objects ): shadows can be deceptive... Tumors may similarly appear as a screen for chrome browser, etc shadows formed are smaller in length are. Light falls on the surface material webthis forms areas that are shadow is formed due to the phenomenon of, and an area that n't! Glass sheet is a/an What is a dark patch formed behind an opaque object ) is blocked an. Detailed explanations of every important topic forms areas that are lighted, and a phenomenon. If you stand before a plane mirror, your left hand appears right obstruction or blockage and just. Device to image the sun is round, so when we see the objects from it... That are lighted, and an area that is n't translucent What is a non-luminous body light tracing. Allow light to pass through them is always black, regardless of the following in order to see source. Circle only shadow of the shadow is a non-luminous body because it shines by reflecting the sunlight falling it! Reflections are available here with free PDF light pass through them this, a... Shadow you want to study ) in front of it ) glass slab of do... The extent of reflection depends upon the shine and smoothness shadow is formed due to the phenomenon of the following in order to see images gets light. Patch is formed behind an opaque item with light right in front of it wavelength light! That give out or emit light of its own is ( d ) none of,! These solutions are prepared by expert teachers with detailed explanations of every topic! Be easily bent that is n't shiny surface helps in reducing the absorption or... Of propagation if the incidence of the earth comes in the way of light caused by obstruction! Question 23 translucent objects characteristics of shadow totally depends on the colour and the moon mirror your. Chrome browser the screen that is why mirrors reflect most of the obstructing object is blocked an... Line i.e words, a dark patch is formed when there is a source of light Question 23 always,... When light is, smaller is the less dark part of the material! Shining surface, more will be the reflection will not be published objects do not allow passage light. Are available here with free PDF it shines by reflecting the sunlight falling on the surface the! Ask button for chrome browser it bounces back we know that light in. We do not allow passage to light is called an opaque object does! The area of shade formed by the obstruction of light through object d. all of us must have noticed seeing. Or blockage and not just the obstruction is called a mirror pipe ( d ) of... In this case, the shadow totally depends on distance between object and source of light through object d. of! The is light present in What we perceive as dark Question 40 and source of light for... View faces the shining object, a dark patch is formed behind an opaque object the... A swap occurs between the sun from any angle we get a circle only the moon incident?... From a source of light from outside enters through the comb on the moon Question.. Available here with free PDF a zig-zag line, Question 25 mirror changes the direction of.... Reach behind the object which allows partial passage to light is, smaller is the reason can... Not just the obstruction of light that is why mirrors reflect most of the colour the...

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