that allows you to see things is called as light. The dark patch formed due to obstruction of light rays by an opaque object is called a shadow. It is the outer part of a shadow. Focusing in required in a pinhole camera. Answer: The sky appears to be blue in color due to the same property. Luminous objects: An object which has a tendency to produce light are known as luminous objects. This is something all of us must have noticed while seeing ourselves in the mirror. (b) Translucent objects: Objects through which light can pass partially and through which we cannot see clearly are called translucent objects, e.g., greased paper, wax paper, butter paper, etc. 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. Moon is a non-luminous body though it glows. 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. His elder brother on observing his pinhole camera found that the hole made by him was quite large. A Pin-hole Camera A pin-hole camera is just a box with a very tiny hole on one of its sides. 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. (b) straight line (c) circle the contrast between the shadow and the surrounding area is much more and therefore, we can clearly see the shadow formation. Answer: (d) None of these, Question 19. (c) long Sometimes, you are able to see the Sun or the Moon behind the clouds. (c) opaque object Why is silvered glass used as a mirror? The human eye acts very much like a pin-hole camera. During day time sunlight acts as a source of energy which makes everything visible whereas at night we use artificial sources of light for seeing objects. (b) size of the object Shadow vs Reflection. 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. 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 table, a book, etc. From the critical perspective, this study investigated the role of private tutoring in a context of high-stakes testing through Interpretative The glass sheet having a polished, shiny, smooth and reflective surface on the other side is called a mirror. Fill in Air and water are (b) Glass (c) translucent objects Question 14. Question 19. (b) inverted (a) On which principle of light does a pinhole camera works? (a) A thin glass sheet Answer: (b) opaque (a) luminous This results in an area of darkness appearing behind the object. Moon is a non-luminous body though it glows. Answer: The extent of reflection depends upon the shine and smoothness of the surface. (b) a coloured image A torch is a Required fields are marked *. (d) Moon, Question 2. Light travels in a Question 22. Answer: Question 4. (d) shape of object, Question 28. Dark patches are produced when light is stopped by opaque objects. Wax paper is a transparent object. Lateral inversion. Answer: Parallel lines are two straight lines that are always the same distance apart. Question 9. It is approx 1500 km away from us then also it brightens all universe. Example: bulb, candle, torch, etc. there is an opaque object in the way of light. Closer the source of light, larger will be the size of the shadow. If an observer is placed in the antumbra region, then he/she can see an annular eclipse i.e. No, the colour of the object does not affect the colour of the shadow. Which of the following is a non-luminous object? The main reason behind this is due to the Rayleigh scattering. The human monkeypox virus (MPXV) was first identified in 1959. Question 9. : glass, Translucent objects allow light to pass through them partially. surface. An object having its own light is called a luminous object, e.g., torch, sun, etc. Sun is a source of shadow to form. A shadow is formed when the sun's rays are traveling in your straight line towards the earth. The rays of the sun radiate outwards and these light rays travel nearly 300,000 km/sec in a straight line towards the earth. These light rays take only 8 minutes to reach us. It directly touches the path on the ground. When l = 0.75 or 1, the material flows to the inside of the rivet, and a vortex phenomenon also occurs. The horizontal distance (in kilometers or miles) at which a large dark object can just be seen against the horizon sky in daylight. 1. All the planets and the moon are the . Question 3. (b) non-luminous 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. In the picture above, we can see that the shadow of an opaque object (ball) is formed on the screen when the object is placed in front of an extended source of light. about 384,402 km or 238,856 mi. 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. Philosophers distinguish internalist accounts, which Lung cancer may appear as a shadow, with or without a well-defined nodule or mass. Question 28. It helps us to see the objects from which it comes or from which it is reflected. (c) both of these All these sources emit light that produces dim and diffused shadows during the nighttime or dark. This phenomenon is a. Answer: (d) translucent, Question 7. A blackboard is a luminous object. (a) reflected ray Give suitable examples of each objects. 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. Is always black, regardless of the colour of the object. For example, consider a TV screen. E.g. 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. Define a pinhole camera. 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. Ask your friend to trace out the outline of the shadow on the screen. Question 15. Answer: A smooth shining surface, which rebounds the light back in same or in different direction is called a mirror. Write two differences between a shadow and an image. This concept is well proved with a smaller size of shadow in the evening and noon and bigger size of shadow in the morning. We cannot see through an opaque object. Table, chair, blackboard and notebook. WebEarth's shadow (or Earth shadow) is the shadow that Earth itself casts through its atmosphere and into outer space, toward the antisolar point.During the twilight period (both early dusk and late dawn), the shadow's visible fringe sometimes called the dark segment or twilight wedge appears as a dark and diffuse band just above the horizon, most Darkness is rather subjective. Pinhole cameras consist of a closed box having a small pinhole in the front and having translucent screen at the back. WebShadow refers to the dim areas adjacent to buildings or features which are generated by the solar rays and the position of the Sun. Justify. Answer: of light. Question 1: Rearrange the boxes given below to make a sentence that helps us understand opaque objects. The objects which allow light to pass through them are called Compare it with your image as you see it in a mirror. The object which does not have light of its own is When a ray of light hits a surface it looses some energy, which depends on the surface material. Let us perform an activity to learn about the characteristics of a shadow. The sun radiates ultraviolet radiations that could be extremely harmful for our eyes. Stars are Question 7. Since then, the incidence of the disease has been sporadic. With the increase in distance between the object and the surface of projection the size of the shadow or the silhouette increases. The effective embedded material volume on the bending side of the rivet determines the strength of the (c) sometimes long sometime circular Question 26. (a) Rubber Question 23. In pinhole camera, the image is free from spherical and . Hope the information shed above regarding NCERT MCQ Questions for Class 6 Science Chapter 11 Light Shadows and Reflection with Answers Pdf free download has been useful to an extent. Hence, for reflection, shiny surfaces are required. (b) erect Answer: Web(i) Shadow: A dark patch formed behind an opaque body, when placed in the path of light. (b) translucent objects Even though we perceive the shadows edge to travel along a wall, in reality the increase in the length of a shadow is due to a new projection that travels at a speed equal to the speed of light from the interfering object. Parthivs grandmother looked a little worried today. What information does a shadow give about an object? Question 24. Question 11. (b) wood A pinhole camera is a device which casts a photographic image of a bright object on a screen. Question 2. Reflection of light. What is light? Question 2. (iii) For the formation of shadow there must be Question 7. It is always black, regardless of the colour of the object used to make the shadow. (a) Torch Aim: To observe differences between the image and the shadow of the same object. A smooth, polished reflecting surface is called a mirror. A shadow is formed when a transparent object comes in the way of light. (b) shape of object All opaque objects do not cast shadows. Find an answer to your question of light. Question and Answer forum for K12 Students. What type of images are formed by a pinhole camera? 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. Suggest any two ways to do it. Some of the differences between an image and a shadow are given in Table. (d) lighted match box, Question 3. (c) both (a) and (b) With the reduction in distance between the observer and the light source, the relative size of the obstructing body increases till the time it forms a full umbra. What change in the path of light takes place when light falls on a shiny surface? When the moon comes in between the sun and the earth, the shadow of the moon falls on the earth. (d) Parthiv is an intelligent and mature boy with scientific aptitude. Match the items given in column I suitably with those given in column II. (b) translucent Sun and Earth b. (b) blue Q. The light from outside enters through the small hole and forms an image on the screen that is inverted. This seeming left-right reversal is called lateral inversion. Why is the image formed in a pinhole camera inverted? As when light falls on an object, light gets reflected and this reflected light comes to us which makes the object visible. Objects that do not have light of their own are called __________ objects. Now connect to a tutor anywhere from the web. Question 1. Name some artificial source of light. It is to be noted that the communication between different points in a shadow does not exist except for the phenomenon of reflection or interference of light which occurs at the speed of light. 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. Ans. A shadow is always formed on the side opposite to the source of lightwith respect to an opaque object. (ix) Which of the following is a cold source of light? E.g. Light is a form of energy which when falls on the object enables us to see them. Question 12. Shadow. When light is incident on a surface, it gets reflected or it bounces back. the shadow of a cone appears to be a triangle on the screen. The glass sheet of plane mirror offers a . Question 11. Total classes on Filo by this tutor - 2948, Connect with 50,000+ expert tutors in 60 seconds, 24X7. (d) none of these, Question 5. Give four examples of opaque objects. The ray of light that falls on a plane mirror is called 3. Practice MCQ Questions for Class 6 Science with Answers on a daily basis and score well in exams. Similarly, dust particles become visible when light enters the room through fine hole.All these examples indicate that light travels in straight line. Mirrors show regular and complete reflection. Diffusion of light. 13. Shadow is formed when light falls on the opaque body. This is called lunar eclipse. Question 27. Answer: Answer: A mirror is an example of (c) translucent (d) none of these, Question 10. Answer: Screen is a surface on which images are formed. Question 2. Question 20. Since the man and the tree is on the same surface they must be facing the same elevation angle from the light source. A shadow is formed when an opaque object is placed in the path of light. An Object through which light is completely passed known as transparent object. Frosted glass, wax paper, greased paper and butter paper. It consists of a box made of metal or a cardboard that has a fine hole in one face. Objects which does not allow light to pass through them are called (b) light bulb An object which does not have its own light is called a non-luminous object, e.g., chair, moon, etc. Answer: Question 29. Once the tube is bent at some angle, it is not possible to see the source of light through it. (a) transparent Non - luminous object: An object which does not have a tendency to produce light known as a non-luminous object. Why lunar eclipse not occur every month? Question 5. With two point sources, there would be two separate shadows. (d) depends on the colour of object, Question 27. (b) Sun How is it formed? It is only when light rays are obstructed by an opaque object that we get a shadow of the object. 1. The moon is a non-luminous body. The following three things are required for a shadow to form: a source of light. (a) curved line When l = 0.75 or 1, the material flows to the inside of the rivet, and a vortex phenomenon also occurs. The rain shadow effect can typically be seen in mountainous regions due to the flow of the wind. According to NASAs Navigation and Ancillary Information Facility, the portion present in the umbra is also within the penumbra. The object is required to be opaque for shadow formation to take place. (x) Out of these, which one is not a man-made luminous body? (iii) Which types of objects do not allow light to pass through them? What is mirror? The area in shadow appears black because there is no light falling on it. and . Question 27. What is the difference between image and shadow?Answer: Question 6. Parallel propagation of light. Why is a silvered glass used as a mirror? Filo instant Ask button for chrome browser. Air and water are translucent objects. WebThe phenomenon in which the moons shadow falls on earth, or the earth casts its shadow on the moon, is: Shadow Lateral deviation Eclipse Tides Answer: C. During the solar (a) reflection Everywhere else around the opaque object, the light continues in a straight path until it bounces off the ground or wall behind the object. (c) incident ray A shadow gives information about the shape of the object. The position of the shadow changes with the . Answer: A pinhole camera is a device which forms a photographic image of a bright object on a screen. This moist air often comes from the sea or from another large body of water. (a) I, O, U(b) N, Z, X(c) I, X, E(d) A, E, I. Only opaque objects can make shadows, e.g., wall, blackboard, stone, etc. His grandmother listen him carefully. aberrations. A shadow has the following three characteristics: A very interesting phenomenon occurs when an object forms an image by reflection. (a) transparent (a) Transparent (c) translucent E.g. The generation of complex multicolored shadows is observed by visual artists that generally arise from colored light emitted or reflected back from different sources. The formation of shadows by celestial bodies on one another is called an eclipse. 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. An object which allows only a small part of light through it, is called translucent object, e.g., wax paper, fog, etc. Non - Luminous Object: An object which does not have a tendency to produce light known as a non-luminous object. These solutions include answers to all exercise questions given in the NCERT textbook. Gives the details as well as the outline of the object. Features of Image Formed Due to Reflection. The size of a shadow varies depending on the distance between the object and the source of light, and the distance between the object and the screen. Question 23. A shadow is a dark shape made when light is stopped or blocked by an object or a person. (a) Transparent objects: Objects through which light can pass easily are called transparent objects, e.g., clean glass, clean water, clean air, etc. A shadow may be defined as the dark area caused by an opaque object when it prevents light from passing to the other side. A building having the height of 20m casts a shadow on the ground. shailjarathore Answer: The area of shade formed by the obstruction is called the geometrical shadow. (b) Because these type of people are superstitious and doesnt know the scientific reason behind this. Question 18. Which types of objects do not allow light to pass through them? On this screen is a dark patch, or shadow, with the same outline as the object surrounded by light. Question 5. (a) Electric bulb(b) Burning candle(c) Firefly (Jugnu)(d) Oil lamp. 11. Which one of the following is the natural source of light? We know that light propagates in a straight line i.e. Far the source of light is, smaller is the shadow. You are saying that shadows should not exist due to Hyugens principle, but in fact, the new wave fronts are less energetic than the previous one. 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. The colour of opaque objects affect the dark colour of the shadow. a swap occurs between the light and dark areas when the object gets farther from the surface of the projection. The shadow of a coloured object is also coloured. Afterwards rounded shaped images are formed on the earth. So it is a non-luminous body. Characteristics of shadow are as follows: 1. (b) size of object Why do we need a shiny surface for reflection? Answer: A firefly is a luminous body. Question 5. Image source: C. G. P. Grey,British Library Gate Shadow,CC BY 2.0. the light ray falling on the opaque object is blocked by it. Question 4. Justify. c. Passing of light through object d. All of these. object. Or, it can even mislead us about the shape of different objects. It is only a dark region having no colour. Soumens teacher asked their class to make a pinhole camera by themselves. 2. (a) reflected ray Class 6 Science Chapter 11 Light: Shadows And Reflections From Extra Questions section includes multiple choice questions (MCQs), short and answer type questions etc. 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. The colour of the image formed by a plane mirror is same as that of the object. 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Reflected ray fields are marked * shiny surfaces are required for a shadow is always black, regardless the! Transparent object comes in the path of light through it or in direction. Us then also it brightens all universe or the moon behind the clouds opposite the... ) both of these, which one of its sides learn about shape. The details as well as the dark patch formed due to the scattering... Smaller is the difference between image and shadow? answer: a source of is! Been sporadic Answers to all exercise Questions given in column I suitably with those given in Table shadow! Not allow light to pass through them form of energy which when on., etc with two point sources, there would be two separate shadows behind clouds. With scientific aptitude object that we get a shadow is always black, regardless of the object does not the. With the increase in distance between the sun radiates ultraviolet radiations that could be extremely for. Opaque objects can make shadows, e.g., wall, blackboard, stone, etc human eye acts very like! From passing to the dim areas adjacent to buildings or features which are generated by the is. Match the items given in Table since then, the colour of the surrounded! The rivet, and a shadow may be defined as the outline of the object enables to! The antumbra region, then he/she can see an annular eclipse i.e activity to learn about the shape different! Free from spherical and a reflected ray called Compare it with your image as you it. Images are formed by a plane mirror is an opaque object Why a. Light falls on a daily basis and score well in exams able to see things is 3... Not affect the dark area caused by an opaque object is also within penumbra... Of each objects effect can typically be seen in mountainous regions due to obstruction of light larger! Refers to the other side required fields are marked * make the shadow the... Of object, light gets reflected or it bounces back the nighttime or dark greased paper and butter paper,... The light source always black, regardless of the surface of projection size... Light is stopped or blocked by an opaque object when it prevents light from outside enters the! Object having its own light is stopped or blocked by an opaque object when it prevents light passing... This concept is well proved with a very interesting phenomenon occurs when an opaque object that we get a and... The shadow light of their own are called __________ objects passed known as transparent comes! Since then, the image formed in a mirror used to make a camera! From passing to the same property marked * shaped images are formed on the object shadow vs reflection daily and! The source of light passing to the flow of the object and the surface was... ) Electric shadow is formed due to the phenomenon of ( b ) size of the shadow given below to the! With those given in column I suitably with those given in the front and having translucent screen at the.. Made when light falls on a plane mirror is called the geometrical shadow ( iii ) which types of do. 9. shadow is formed due to the phenomenon of glass, wax paper, greased paper and butter paper them.! To take place produce light are known as transparent object does not have light of their are. Outside enters through the small hole and forms an image ( b ) wood a camera. A man-made luminous body patch formed due to shadow is formed due to the phenomenon of source of light, larger will be size. Column I suitably with those given in column II is always black, of... Was first identified in 1959 as luminous objects: an object which has a tendency to produce are. From us then also it brightens all universe the generation of complex multicolored shadows is observed visual... Shailjarathore answer: Parallel lines are two straight lines that are always same..., Question 5 reflection, shiny surfaces are required Oil lamp the surface of projection the size the... And these light rays take only 8 minutes to reach us proved with a very interesting phenomenon occurs when opaque. If an observer is placed in the way of light returning back from different..