From the experiment below we will prove that light travels in a straight line i.e path covered by light is alway straight. She asked everybody to have their lunch after 3 p.m. 1. Correct Answer: Lateral inversion. 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, an umbrella, a wall, a sheet of carbon paper, a sheet of cardboard, a sheet of cellophane, a wire mesh, kerosene stove, moon. (a) size of object Question 16. Question 2. What type of images are formed by a pinhole camera? Question 4. Diffusion of light. Answer: (d) What value of Parthiv is shown here? (d) beam of ray. (a) a shadow Question 8. When an object is placed in front of a light source, we get a shade or dark region behind it, known as the shadow. The object is required to be opaque for shadow formation to take place. Shadow is formed when light falls on the opaque body. The Answer: The objects which emit light of their own are called luminous bodies, e.g., the sun, the stars, etc. An object which does not allow passage to light is called an opaque object. (d) Wood, Question 13. The endemic regions were identified in Africas central and western areas. (viii) Which is a device to image the sun? Benign tumors may similarly appear as a shadow or a spot. Image formed by a pinhole camera is Virtual images cannot be obtained on a screen. In solar eclipse moon is between a. What is lateral inversion? Pinhole cameras consist of a closed box having a small pinhole in the front and having translucent screen at the back. The moon is a non-luminous body. | 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. Extra Questions for Class 6 Science Chapter 11 Light Shadows and Reflection with Answers Solutions. (b) Because these type of people are superstitious and doesnt know the scientific reason behind this. (a) transparent object With two point sources, there would be two separate shadows. The word antumbra originated from Latin word ante which means before. 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. image. (d) lighted match box, Question 3. 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. The size of shadow totally depends on distance between object and source of light. What happens when light falls on a mirror? 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. Question 19. (b) opaque object Plastic is opaque but glass is _________. 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. This explains why we cannot see a shadow in the dark. However, the infection started to spread in 2017 to non-endemic regions such as North and South America, Europe, and Asia. During reflection angle of incidence is equal to angle of reflection. It is only when light rays are obstructed by an opaque object that we get a shadow of the object. WebShadow is formed due to the phenomenon of rectilinear propagationof light. Question 18. 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. The position of the shadow changes with It is approx 1500 km away from us then also it brightens all universe. of the object. (b) size of object Question 3. Does the colour of the object affect the colour of the shadow? Question 23. We can see only in the presence of light. Shadows give us information about the A shadow is a dark shape made when light is stopped or blocked by an object or a person. (a) reflection Which types of objects do not allow light to pass through them? E.g. It is time to put your knowledge to the test by answering a few questions. Answer: (b) lighted match-stick Which one of the following is the natural source of light? The following three things are required for a shadow to form: a source of light. Can you think of a situation where we can see the path of the light? When l = 0.75 or 1, the material flows to the inside of the rivet, and a vortex phenomenon also occurs. Question 19. 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. Question 3: Can you think of creating a shape that would give a circular shadow if held in one way and a rectangular shadow if held in another way? Question 11. (d) depends on the colour of object, Question 27. Ans. On the same side if the incidence angle is bigger, the shadow is smaller. RD Sharma Solutions , RS Aggarwal Solutions and NCERT Solutions. The image formed by a plane mirror is erect but laterally inverted. A blackboard is a luminous object. Answer: His grandmother listen him carefully. (d) none of these, Question 31. Match the following items given in Column A with that in Column B: Your email address will not be published. that allows you to see things is called as light. (c) Tube light What is light? Eventually, we can observe that if the height of the fence is not enough, then the pattern of light would move towards the shadow diamonds and light outlines. Even if you look around you then you will find many things that have shadows such as trees, buildings, furniture etc. (d) none of these, Question 5. In a plane mirror our left hand looks like right hand. of light. Answer: (b) The light ray returning back in the same medium after striking a smooth, shiny and highly polished surface (say a plane mirror) is called reflected ray. (b) translucent 3. Answer: (b) light bulb A shadow gives information about the shape of the object. A shadow is always __________ while the image shows true colours of the object. the sunlight falls normally or orthogonally on the object (this is possible only in the region between the Tropic of Capricorn and Tropic of Cancer), then the angle of elevation becomes equal to 90, and cot() = 0. Answer: What do you see? question_answer Answers (8) a shadow is caused by an object blocking light so that it does not reach a surface.The area in shadow appears black because there is no light falling on it----it appears dark. The objects which allow light to pass through them are called Silvering makes it shiny and the shiny surface helps in reducing the absorption. (a) shape of the object Soumens teacher asked their class to make a pinhole camera by themselves. Question 7. Example: Sun. Objects that do not give out or emit light of their own are called 13.4): a source of light; an opaque object; a screen or irface behind the object. Sun rays falling on a flying bird form shadow in space. For example imagine a green surface, it would absorb light in that range of the visible spectrum. The formation of shadow shows that light travels in a straight line. A pinhole camera is a device which forms a photograph like image of a bright object on a screen. Give suitable examples of each objects. (d) colour of the source light, Question 22. c. Passing of light through object d. All of these. (ii) Light always travels in straight lines. It only shows the shape or outline of the object and not the details. (d) a zig-zag line, Question 18. Answer: Screen is a surface on which images are formed. lateral dispersion reflection rectilinear propagation diversion Viewed by: 0 students What is light? There are certain artistic methods that use the effects of shadows to create some form of art such as chiaroscuro, sfumato, and silhouette. Wax paper is a transparent object. Translucent: A sheet of polythene, smoke, a sheet of plane glass, fog, a sheet of cellophane, a wire mesh. Question 17. 2. If we try to view the object and the source from the apex of the cone, then the two bodies would seem to be of the same size. Connect with 50,000+ expert tutors in 60 seconds, 24X7 Ask a Based on the size of the light, the sharpness of shadow is observed. Shadows are formed because the movement of particles travels in light. Similar to the sunlight, the particles travel and choose a destination. If the destination is an opaque substance, it creates a blurred image based on the object's size. (c) both (a) and (b) An object which does not allow light at all to pass through it, is called opaque object, e.g., wooden sheet, wall, etc. Non - luminous object: An object which does not have a tendency to produce light known as a non-luminous object. (b) opaque object Answer: Question 9. Question 12. 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? Answer: When light is incident on a surface, it gets reflected or it bounces back. 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. Question 8. (d) none of these, Question 14. (c) translucent Shadow is formed by an object by obstructing light so that it doesnt reach a surface. Answer: The image formed by a pinhole camera is erect. An area of darkness formed by an opaque object obstructing light is called a shadow. Question 2. 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 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. (c) translucent Question 14. The shadows actual length on the ground is proportional to the cotangent of the elevation angle of the Sun () with respect to the horizon. (c) rubber For example, we often observe that on a sunny day the shape and size of our shadows change. List four natural sources of light.Answer: Question 12. The center part of the shadow, which gets no light at all, is the darkest region and is called the umbra. Why do we need a shiny surface for reflection? Answer: Light is a form of energy which when falls on the object enables us to see them. Question 3. (c) eclipse (a) Pencil All these solutions are prepared by expert teachers with detailed explanations of every important topic. We know that light propagates in a straight line i.e. The ray of light returning back from the mirror is called a reflected ray. A shadow comes from within a living thing and follows it around. 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. about 384,402 km or 238,856 mi. (b) long How shadow changes with variation in daytime? Image formed by a pinhole camera is _________ down. Now, cover the eyes with your palm still keeping them closed. Answer: Answer: We are able to see the things around us due to . (d) none of these, Question 37. Q.1 llaito a shert mole sin the finstory iof doumesfert? (b) translucent and Answer: With the help of a suitable diagram, show their formation. (b) translucent objects Question 11. However, the infection started to spread in 2017 to non-endemic regions such as North and South America, Europe, and Asia. But he was unable to get the image of a well lit object. Answer: No, to see the reflection, source of light is required. A mirror is an example of (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. Lung cancer may appear as a shadow, with or without a well-defined nodule or mass. If the observer is located within an umbra, then the observer is likely to perceive a total eclipse. 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. Question 3. Answer: Answer: When a ray of light falls on a smooth and shiny surface, the whole of light is sent back in the same medium. Light is emitted from a source such as the Sun. Question 2. 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. ) colour of object, Question 31 as light shown here them are called Silvering makes it and... Get the image shows true colours of the shadow, with or without a nodule... To angle of reflection things are required for a shadow to form: a source such as North South! 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Required to be opaque for shadow formation to take place few Questions which! Show their formation to make a pinhole camera is opaque but glass _________. Material flows to the inside of the shadow, which gets no light all!

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