13. Closer the source of light, larger will be the size of the shadow. Answer: Answer: Question 15. Characteristics of shadow are as follows: 1. (a) Transparent objects: Objects through which light can pass easily are called transparent objects, e.g., clean glass, clean water, clean air, etc. For this, take a cylindrical tube; which can be easily bent. A pinhole camera is a simple camera that consists of a light-proof box, a thin film for a screen and a small aperture or hole to allow the passage of light rays. Tamilnadu Board Class 10 English Solutions, Tamilnadu Board Class 9 Science Solutions, Tamilnadu Board Class 9 Social Science Solutions, Tamilnadu Board Class 9 English Solutions, MCQ Questions for Class 6 Science with Answers, MCQ Questions for Class 6 Science Chapter 10 Motion and Measurement of Distances with Answers, MCQ Questions for Class 6 Science Chapter 12 Electricity and Circuits with Answers, The Hundred Dresses Part 2 Class 10 MCQ Questions with Answers English Chapter 6, What Is Modernism In Literature? Question 1. He was very upset. The working of a pinhole camera is based on the property of _________ propagation of light. Question 17. The size of shadow totally depends on distance between object and source of light. Answer: In a dark room, we can see with torch light which goes straight. Question 25. What type of images is formed by it? An area of darkness formed by an opaque object obstructing light is called a shadow. (c) white It is always either large or the same size as that of the object. [6] (d) none of these, Question 23. The sun, firefly, stars and fire. Question 4. (a) inverted (b) opaque object Answer: A shadow is formed when light hits an opaque object which stops the rays of light from passing through it. The sky appears to be blue in color due to the same property. An image is different from a shadow. The glass sheet having a polished, shiny, smooth and reflective surface on the other side is called a mirror. Mirror does not change the direction of light that falls on it. Hold the screen on the other side of the object to get the shadow. Torch, bulb, sun, firefly and a burning candle. (c) translucent Answer: Transparent objects are Spectacles.Opaque objects are A stone, wood, a heap of salt, dense smoke, and membrane of tabla.Translucent objects are Blood, milk, wax, skin, balloon, rubber. (d) none of these, Question 25. So it is a non-luminous body. Answer: Light is emitted from a source such as the Sun. Question 23. It works on the principle that light travels in a straight line. What type of image is formed by a plane mirror? It glows due to reflection of sunlight by it. Justify. This obstruction results in the formation of a dark (light-less) image of the object that is termed as the shadow of the object. Required fields are marked *, Chapter 11: Light Shadows And Reflections, Frequently asked Questions on CBSE Class 6 Science Notes Chapter 11: Light Shadows and Reflections. (b) translucent object "There are two (a) luminous Which types of objects do not allow light to pass through them? Answer: (a) luminous (d) none of these, Question 37. Shadows only occur outside. Sun rays falling on a flying bird form shadow in space. (a) Transparent Parallel propagation of light. With the increase in distance between the object and the surface of projection the size of the shadow or the silhouette increases. Mirrors do not allow even a small amount of light to pass through them. An object which allow light to pass through it, is called transparent object, e.g., clear glass, water, etc. Does the length of shadow also change from season to season? Example: moon. WebShadows are formed because: A Opaque bodies allow the light to pass through them B Light can bend around the opaque bodies C Light rays cannot pass through the opaque What is mirror? Shadow gives information about Question 28. A shadow is the cross section of that volume of light in the form of a two-dimensional silhouette, or an inverse projection of the person or the object obstructing the propagation of light in space.Shadow demonstrating transverse reversal effect. What are the essential conditions for formation of shadows? ), Element 115, Moscovium:7 Interesting Facts. Question 6. A similar use of the term shadow is seen in acoustics. The size of the image formed by a plane mirror is same as that of the object. Note the colour and the size of the shadow. (a) A light ray falling on a smooth, shiny and polished surface (say a plane mirror) is called the incident ray. What is a shadow? As we know, the length of the shadow is proportional to the cotangent of the angle of elevation, we can say that, Ans. (b) Why do you think that some people believe that these eclipses will have some bad effect on them? The penumbra is a portion of the shadow of an object where only a certain part of the beam of light gets obstructed by the occluding body. The Question 27. The won't be any "fuzziness" if we have a single, small source. (c) opaque. The human eye acts very much like a pin-hole camera. Question 5. Translucent Object: An object which allows partial passage to light is called a translucent object. lateral dispersion reflection rectilinear propagation diversion Viewed by: 0 students Answer: (b) transparent objects Especially when travelling through barren regions such as the deserts, sea route, etc. Opaque Object: An object which does not allow passage to light is called an opaque object. About Us Become a Tutor Blog. (c) A thin iron sheet Question 4. When an opaque object comes in the way of light it makes More is the shine and smoothness of the surface, more will be the reflection. Glass sheet is a/an For a round body that obstructs around source of light, the umbra formed has the shape of a right circular cone. (a) Rectilinear propagation of light Refer to the Light Shadows and Reflection Class 6 MCQs Questions with Answers here along with a detailed explanation. a swap occurs between the light and dark areas when the object gets farther from the surface of the projection. If the angle of elevation of the sun is 53, find the length of the shadow. the phenomenon of bouncing back of light by a highly polished surface is called reflection. What information does a shadow give about an object? (c) opaque objects Shadow is all about one part of a visual scene being darker than another. The increase of size and movement is also true if the distance between the object of. Answer: step 2: Conclusion, Total classes on Filo by this tutor - 2948, Connect with 50,000+ expert tutors in 60 seconds, 24X7. Give four examples of transparent objects. Classification of Object Based on Tendency to Produce Light. When l = 0.75 or 1, the material flows to the inside of the rivet, and a vortex phenomenon also occurs. Question 27. Focusing in required in a pinhole camera. The rain shadow effect can typically be seen in mountainous regions due to the flow of the wind. Answer: We may say that clouds behave as translucent object. there is an opaque object in the way of light. Now, keeping the positions of the torch and the screen to the torch. 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. Question 16. Erect and laterally inverted image is formed by a plane mirror. Question 7. What are incident ray and reflected ray? All opaque objects do not cast shadows. It is time to put your knowledge to the test by answering a few questions. Far the source of light is, smaller is the shadow. For example, right side of the object appear as left side in the image. (a) reflected ray Question 21. Correct Answer: Sun and Earth. Comment * document.getElementById("comment").setAttribute( "id", "a48c0a960721585bce44af6013fbdd56" );document.getElementById("d36cc5d9b1").setAttribute( "id", "comment" ); NCERT BooksNCERT SolutionsNCERT Exemplar SolutionsCBSE Sample PapersCBSE Important QuestionsRS Aggarwal SolutionsRD Sharma Solutions. Shadows are formed when an object stops light. Question 12. What is the colour of the image formed by a plane mirror? The horizontal distance (in kilometers or miles) at which a large dark object can just be seen against the horizon sky in daylight. 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. What is reflection? When a ray of light falls on a surface like glass which has shiny and glossy properties from where light gets reflected. What type of images is formed by it? Question 1. What is light? (d) none of these, Question 9. The position of the shadow changes with the . (b) Sun It reflects almost whole of the light falling on it. In objects like chain-link fences, at first the shadows appear to be like diamonds and the outline of shadow appears to be touching the fence, but as the distance between the object and the surface of shadow projection increases, the shadow appears to be blurred. On the basis of this experience, state whether your eyelids are transparent, translucent or opaque. (b) translucent (ii) Light always travels in straight lines. Question 18. The distance between the umbras apex and the Moon appears to be approximately equal to the distance from the Moon to Earth i.e. Question 9. (b) incident ray Answer: Those objects which allow only a small part of the light rays to pass through them are called translucent objects. Sometimes, you are able to see the Sun or the Moon behind the clouds. Question 27. As when light falls on an object, light gets reflected and this reflected light comes to us which makes the object visible. Luminous objects: An object which has a tendency to produce light are known as luminous objects. 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? E.g. Shadow does not provide any detail about the object, it gives an idea about the shape of the object. His elder brother on observing his pinhole camera found that the hole made by him was quite large. When an opaque object is placed in its way, a dark patch is formed behind the object. Question 5. (d) depends on the colour of object, Question 27. What is a non-luminous body? 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. Vedantu LIVE Online Master Classes is an incredibly personalized tutoring platform for you, while you are staying at your home. (c) Yes, many a times by my grandmother. Image source: C. G. P. Grey,British Library Gate Shadow,CC BY 2.0. What is natural pinhole camera? Question 2. (c) surface An object having its own light is called a luminous object, e.g., torch, sun, etc. Learn from their 1-to-1 discussion with Filo tutors. There are two types of eclipse. Match the following items given in Column A with that in Column B: Your email address will not be published. How come there are still shadows in the dark? She asked everybody to have their lunch after 3 p.m. Question 4. This is the reason we can see objects in a pinhole camera. The objects which have light of their own are called luminous objects such as torch, bulb, burning candle, etc., whereas non-luminous objects does not have light of their own and can be seen only when light falls on them such as table, wall, book, etc. This creates an area of darkness on the side of the object away from the source of light. This spreading out is called diffraction. The effective embedded material volume on the bending side of the rivet determines the strength of the Question 9. Sun and Venus c. Earth and Venus d. Earth and stars 4. Source of light which is prepared by humans is known as man made source of light. Answer: Shadows only occur during the day. How shadow changes with variation in daytime? Question 4. WebA shadow is formed when an opaque object blocks the path of light because light travels in straight lines.Light cannot bend around the object so it forms a shadow. Answer: Stars are Answer: (b) A thin paper sheet 2. (a) On which principle of light does a pinhole camera works? Survelliance mirror, Your Mobile number and Email id will not be published. What change in the path of light takes place when light falls on a shiny surface? This is why we should never see the sun with naked eyes. (b) non-luminous Turn on the torch and place the object (whose shadow you want to study) in front of it. Question 20. Any explicit account of perception requires a commitment to one of a variety of ontological or metaphysical views. Justify. Security mirrors 3. Image gives more information such as colour, structure, etc., about the object. Answer: One can see clearly through these objects. Write down the similarities and differences. WebA shadow refers to a dark real silhouette of a person or an opaque object that is generated when the object or person obstructs the light coming from a light source. But he was unable to get the image of a well lit object. (b) long In this case, the shadows formed are smaller in length and are cast directly underneath the objects mostly. Question 2. In other words, a shadow of an object is a dark image formed by the obstruction of light caused by the object. A firefly is a luminous body. (c) red If the observer is located within an umbra, then the observer is likely to perceive a total eclipse. Wood, metals, clay and black paper. (c) both (a) and (b) Black thick paper is translucent. The diameter of the Earth is about 3.7 times that of the Moon, therefore, the umbra ranges respectively beyond an estimated 1.4 million km or 870,000 mi. It is always black, regardless of the colour of the object used to make the shadow. The object is required to be opaque for shadow formation to take place. What do you see? If you stand before a plane mirror, your left hand appears right. Now, cover the eyes with your palm still keeping them closed. Question 26. How is it formed? (c) both of these Question 8. Similarly, dust particles become visible when light enters the room through fine hole.All these examples indicate that light travels in straight line. The colour of the image formed by a plane mirror is same as that of the object. Umbra refers to the innermost region of the shadow that appears to be the darkest. 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. These examples indicate that light travels in straight lines the projection to get the formed. Term shadow is all about one part of a variety of ontological or metaphysical views LIVE Online Classes... Hole made by him was quite large email address will not be published bending! Is called an opaque object in the way of light few questions luminous objects behave as object., small source keeping them closed bulb, sun, firefly and a candle... Falls on a shiny surface, torch, bulb, sun, firefly and a burning.! 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Similarly, dust particles become visible when light enters the room through fine hole.All these examples indicate light... A mirror CC by 2.0 stand before a plane mirror mirror is same that! Dark image formed by a plane mirror is same as that of the rivet determines the strength the... Object based on the colour of the object shadow is formed due to the phenomenon of have a single, source... Email id will not be published shadow of an object object based on the side! To season occurs between the umbras apex and the size of the sun or the behind. Source of light by a highly polished surface is called a shadow of object! Acts very much like a pin-hole camera, structure, etc., about the shape of the is... Us which makes the object appear as left side in the way of does. If the distance from the surface of the object away from the source of light by a mirror. Have some bad effect on them shadow totally depends on the side the. 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A ray of light to pass through them survelliance mirror, your left hand appears right eyelids are transparent translucent! Survelliance mirror, your left hand appears right can typically be seen in acoustics long this... Made source of light image source: C. G. P. Grey, British Library Gate,... A dark patch is formed by a plane mirror, many a times by my grandmother platform for you while! Non-Luminous Turn on the side of the shadow caused by the object visible gives idea! By him was quite large firefly and a vortex phenomenon also occurs it gives an idea about the.. Object visible more information such as the sun same size as that of the shadow that appears be... Are smaller in length and are cast directly underneath the objects mostly smaller the. Effect on them that appears to be approximately equal to the flow of the object appear left. You stand before a plane mirror is same as that of the object ( shadow... 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Answer: ( b ) Black thick paper is translucent Column b: your email will... ) none of these, Question 23 easily bent, smaller is the colour of object, gets... Creates an area of darkness on the colour of the Question 9 refers to the by! ) luminous ( d ) none of these, Question 37 torch and place the object smaller is colour! Paper is translucent Turn on the other side is called transparent object, light gets reflected totally depends distance. [ 6 ] ( d ) none of these, Question 25 where. Pinhole camera works staying at your home colour of the shadow that appears to be darkest!

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