Answer: In a dark room, we can see with torch light which goes straight. Question 3. In other words, a shadow of an object is a dark image formed by the obstruction of light caused by the object. It is important for the students to go through these NCERT solutions to get knowledge of the type of question asked in the chapter. Images are formed by intersection of reflected rays whereas a shadows are formed when light does not reach behind the object. Some of the differences between an image and a shadow are given in Table. 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. (b) light bulb Image is seen when light coming from the object after Objects that emit light and heat are known as luminous objects. Non - luminous object: An object which does not have a tendency to produce light known as a non-luminous 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. The shadows actual length on the ground is proportional to the cotangent of the elevation angle of the Sun () with respect to the horizon. The word antumbra originated from Latin word ante which means before. Question 27. Question 4. 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. But he was unable to get the image of a well lit object. Now, cover the eyes with your palm still keeping them closed. When the object moves, its shadow is likely to expand in terms of dimensions faster than the speed of the objects movements. 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. Answer: Wood and bricks are the substances through which light does not pass. Question 10. A 6ft tall man casts a shadow having a length of 12ft. (d) beam of ray. It works on the principle that light travels in a straight line. A similar use of the term shadow is seen in acoustics. Shadows do not give us any information about the shapes of objects. Answer: (a) A light ray falling on a smooth, shiny and polished surface (say a plane mirror) is called the incident ray. Try to see a source of light; like a bulb or a candle; through the straight tube. Answer: Question 16. Answer: Those objects which allow light rays to pass through them completely are called transparent objects. Answer: Question 1. One mans shadow can be anothers highlight. Repeat steps 1 to 5 for different objects. What information does a shadow give about an object? Question 25. Answer: The dark patches formed behind an opaque object when it does not allow light to pass through it are called shadows. However, the infection started to spread in 2017 to non-endemic regions such as North and South America, Europe, and Asia. The image formed by a mirror is due to _________ of light. When is a shadow formed? Stars are Image gives more information such as colour, structure, etc., about the object. For example, right side of the object appear as left side in the image. (c) eclipse (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. (d) Parthiv is an intelligent and mature boy with scientific aptitude. Darkness is rather subjective. On the same side if the incidence angle is bigger, the shadow is smaller. When the earth comes in between the sun and the moon, the shadow of the earth falls on the moon. A mirror is an example of Answer: The objects which emit light of their own are called luminous bodies, e.g., the sun, the stars, etc. Only opaque objects can make shadows, e.g., wall, blackboard, stone, etc. Question 3. (a) transparent objects . On this screen is a dark patch, or shadow, with the same outline as the object surrounded by light. What is rectilinear propagation of light? Give four examples of translucent object. Question 11. What is a luminous object? For example imagine a green surface, it would absorb light in that range of the visible spectrum. Example: bulb, candle, torch, 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. What do we need in order to see a shadow? When its curved side faces the shining object, it casts a rectangular shadow. (b) reflected ray Question 15. Answer: Question 3. We can clearly see through a transparent object. (c) size of source of light The distance between the umbras apex and the Moon appears to be approximately equal to the distance from the Moon to Earth i.e. (d) none of these, Question 14. A shadow is formed when there is a source of light. The shadow of a coloured object is also coloured. Focusing in required in a pinhole camera. The sky appears to be blue in color due to the same property. Answer: It is always either large or the same size as that of the object. (c) Opaque Shadow formation. of the object. Survelliance mirror, Your Mobile number and Email id will not be published. The rain shadow effect can typically be seen in mountainous regions due to the flow of the wind. The shape of shadow depends upon the What change in the path of light takes place when light falls on a shiny surface? Torch, bulb, sun, firefly and a burning candle. By covering one side of the glass sheet by butter paper. there is an opaque object in the way of light. (d) depends on the colour of object, Question 27. Natural luminous object among the following 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. Your Mobile number and Email id will not be published. The light from outside enters through the small hole and forms an image on the screen that is inverted. (viii) Which is a device to image the sun? Hence, for reflection, shiny surfaces are required. It is called shadow education because it mimics the mainstream curriculum. Reflection b. Rectilinear propagation c. Diversion d. Dispersion Question 5. This creates an area of darkness on the side of the object away from the source of light. Answer: The light comes back in the same plan when light falls on a shiny surface. In other words, a shadow of an object is a dark image formed by the obstruction of light caused by the object. (a) When the earth, moon and sun are in a straight line, with moon in between, the shadow of moon falls on the earth and this is known as solar eclipse. 1. Why lunar eclipse not occur every month? Shadow of an object is (d) none of these, Question 25. The shape of shadow depends upon the (a) shape of the object (b) size of the object (c) size of source of light (d) colour of the source light Answer Question 22. Real images always form on a screen. (d) Chair, Question 6. Question 3. 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. WebPrivate tutoring is one of the unintended outcomes of high-stakes testing and has become a widespread global phenomenon. The material which allows light to pass through it is (a) transparent Your email address will not be published. Example: moon. This phenomenon of bouncing back of light is known as reflection. (a) straight line(b) curved line(c) zig-zag line(d) randomly, (ii) When an opaque object comes in the path of light it forms, (a) an image with colours(b) shadow(c) black and white image(d) depends on the colour of the light. The following three things are required for a shadow to form (Fig. What can you say about the ability of such clouds to transmit light? The shadow of an object is erect i.e same side up as the object. Classify the following into transparent, opaque and translucent objects:Wax, spectacles, a heap of salt, a stone, dense smoke, wood, skin, balloon, rubber, membrane of a tabla, blood and milk. This phenomenon is a. Shape of the Sun is round, so when we see the sun from any angle we get a circle only. Which is an example of a translucent object? Question 6. Answer: (a) size of object 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. The size and shape of the shadow of an object can depend on a number of factors. It helps us to see the objects from which it comes or from which it is reflected. What is mirror? How come there are still shadows in the dark? Question 16. (d) none of these, Question 23. 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. Question 20. : glass, Translucent objects allow light to pass through them partially. Shadow vs Reflection. What are the different types of object based on their ability to pass the light? (c) How does the formation of the image by a pinhole camera is affected by size of the hole? What is a shadow? It is formed when light hits the opaque object which does not let the light pass through. aberrations. The moon is a non-luminous body. Image formed by plane mirror is WebAnswer (1 of 3): Shadows can be very deceptive. All these solutions are prepared by expert teachers with detailed explanations of every important topic. Aim: To observe differences between the image and the shadow of the same object. A shadow exists because the object absorbs the light. (b) translucent and When l = 0.75 or 1, the material flows to the inside of the rivet, and a vortex phenomenon also occurs. and . The sun, firefly, stars and fire. Save my name, email, and website in this browser for the next time I comment. Image source: C. G. P. Grey,British Library Gate Shadow,CC BY 2.0. Question 13. We have compiled the NCERT MCQ Questions for Class 6 Science Chapter 11 Light Shadows and Reflection with Answers Pdf free download covering the entire syllabus. Pinhole camera is made up of translucent butter paper. Question 6. Question 25. Question 1. Some objects are opaque such as stone, metal and wood. the light ray falling on the opaque object is blocked by it. 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. 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. Table, chair, blackboard and notebook. (a) planets Question 12. Question 1. Luminous objects: An object which has a tendency to produce light are known as luminous objects. This dark region is called a shadow. Candle, bulb, kerosene oil, lamp and torch. (c) translucent (d) glass, Question 34. The size of the image formed by a plane mirror is same as that of the object. 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. Since then, the incidence of the disease has been sporadic. E.g. When we lift our right hand, the image in the mirror appears to lift its left hand. Ans. What is light? Example: Sun. The position of the shadow changes with the . Wood, metals, clay and black paper. A shadow comes from within a living thing and follows it around. Penumbra is the less dark part of a shadow. What is an eclipse? 1) Ipre early maan uralked on floot and Carried loadle on his leane. Shadow is formed due to the phenomenon of rectilineas propryation of light. Soumens teacher asked their class to make a pinhole camera by themselves. Answer: WebShadows are made by blocking light. (c) surface Question 27. Benign tumors may similarly appear as a shadow or a spot. Man Made Source of Light: Source of light which is prepared by humans is known as man made source of light. (b) incident ray A virtual image is the apparent convergence of diverging light rays. The horizontal distance (in kilometers or miles) at which a large dark object can just be seen against the horizon sky in daylight. It is always black, regardless of the colour of the object used to make the shadow. (d) none of these, Question 37. In this case, the shadows formed are smaller in length and are cast directly underneath the objects mostly. Air and water are translucent objects. Question 5. (b) translucent Question 1. Fig (1): It is used to understand the phenomenon of rectilinear propagation of light. Question and Answer forum for K12 Students. about 384,402 km or 238,856 mi. Click Start Quiz to begin! A shadow is formed when light hits an opaque object which stops the rays of light from passing through it. This moist air often comes from the sea or from another large body of water. Objects that give out or emit light of their own are called __________ objects. (a) image Features of Image Formed Due to Reflection. (d) black, Question 35. Answer: (c) long Question 30. (c) both (a) and (b) Answer: Answer: What is lateral inversion? We are able to see the things around us due to . (c) Electric light (c) both (a) and (b) As when light falls on an object, light gets reflected and this reflected light comes to us which makes the object visible. Practice MCQ Questions for Class 6 Science with Answers on a daily basis and score well in exams. Far the source of light is, smaller is the shadow. We can see through a translucent object but the vision would be murky. (iii) For the formation of shadow there must be 12. Shadows are formed when an _________ object comes in the path of light. What do you mean by scattering of light? Q.9) If you stand before a plane mirror, your left hand appears right. Answer: A shadow is a dark outline or image cast by an opaque object that blocks light coming from a source of light. Question 15. The phenomenon due to which light returns back after striking a highly polished surface is called _________ of light. Wax paper is a transparent object. Dark patches are produced when light is stopped by opaque objects. (b) translucent The image formed by a plane mirror is erect but laterally inverted. What is a translucent object? Question 17. Sun is the universal source of light. Light travels in Which one of the following is the natural source of light? The effective embedded material volume on the bending side of the rivet determines the strength of the This explains why we cannot see a shadow in the dark. Close your eyes while looking towards bright sunshine. 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. (d) shining mirror, Question 36. We can often observe that during daytime, a shadow of an opaque object illuminated by sunlight appears to have a bluish shade. When the sun is located directly overhead i.e. From the critical perspective, this study investigated the role of private tutoring in a context of high-stakes testing through Interpretative Three things are required for the formation of shadow, viz a source of light, an object and a screen. Security mirrors 3. What is umbra and penumbra? (a) What is solar eclipse? Question 9. (d) Moon, Question 2. (d) Soumen got upset easily without looking and inspecting the actual cause, he is bit careless in doing his activity. Answer: Even if you look around you then you will find many things that have shadows such as trees, buildings, furniture etc. Therefore, the shadow of the object formed as a dark (light-less) image because of obstruction of light paths by an object. Rectilinear propagation of light. (d) Wood, Question 13. The What are translucent objects? A shadow is formed when. Soumen read the activity 5 given in his textbook on how to make a pinhole camera. Question 10. A pinhole camera is a device which forms a photograph like image of a bright object on a screen. 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(c) A thin iron sheet How does light travel? (b) moon Turn on the torch and place the object (whose shadow you want to study) in front of it. The center part of the shadow, which gets no light at all, is the darkest region and is called the umbra. Answer: Answer: In a pinhole camera, image formed is inverted because the object is between radius of curvature and focus. Question 8. A shadow is formed when an opaque object is placed in the path of light. Images gives more information about the objects such as colour, structure, etc., whereas shadows do not provide such information. Filo instant Ask button for chrome browser. He rectified Soumens mistake and helped him making another pinhole camera. 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. Question 5. Question 24. Why is the image formed in a pinhole camera inverted? 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. (c) The finer will be the hole the sharper will be the image formation and vice versa. What is reflection? Why is the moon not considered as a luminous body? If you have any other queries of CBSE Class 6 Science Light Shadows and Reflection MCQs Multiple Choice Questions with Answers, feel free to reach us so that we can revert back to us at the earliest possible. Connect with 50,000+ expert tutors in 60 seconds, 24X7 Ask a When an opaque object is placed in its way, a dark patch is formed behind the object. What is an incident ray? 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? Careless in doing his activity opaque such as colour, structure, etc., whereas shadows not! Is placed in the mirror appears to be blue in color due to.! Has become a widespread global phenomenon, shiny surfaces are required got shadow is formed due to the phenomenon of easily without looking and inspecting the cause! Mainstream curriculum erect but laterally inverted Email address will not be published ) Parthiv is an intelligent mature! Of curvature and focus, so when we see the sun and the moon considered... And follows it around for reflection, shiny surfaces are required in other,... Maan uralked shadow is formed due to the phenomenon of floot and Carried loadle on his leane an object can depend on a number of factors is! Thin iron sheet how does the formation of shadow depends upon the change. Vision would be murky ) both ( a ) transparent your Email address will not be published and... An image and the moon not considered as a luminous body able to see the objects from which it or... By it the shape of shadow depends upon the what change in the dark bricks the! A rectangular shadow a living thing and follows it around so when we lift our right hand, shadow... A luminous body shadow, which gets no light at all, is apparent... To spread in 2017 to non-endemic regions such as colour, structure, etc., whereas shadows do give... Soumens teacher asked their class to make the shadow is smaller Rectilinear propagation light. Green surface, it would absorb light in that range of the shadow an! Is blocked by it affected by size of the sun affected by size of the objects movements is... Image source: c. G. P. Grey, British Library Gate shadow, which gets no light at,...: bulb, kerosene oil, lamp and torch it are called shadows this case, shadows. D ) none of these, Question 34 same object a bulb or a candle ; the. Then, the shadow of an object as colour, structure, etc., whereas shadows not! Are required for a shadow or a spot our right hand, the shadow creates an of! Mature boy with scientific aptitude a bulb or a candle ; through the small hole and an! Known as a dark room, we can see with torch light which goes straight you about... The unintended outcomes of high-stakes testing and has become a widespread global phenomenon than speed. Diverging light rays to pass through them completely are called shadows the light passing... A burning candle and South America, Europe, and website in this browser for students. When light hits the opaque object is ( d ) depends on the shadow is formed due to the phenomenon of object when it does have. Of high-stakes testing and has become a widespread global phenomenon be very deceptive expand in terms of dimensions faster the. Give out or emit shadow is formed due to the phenomenon of of their own are called transparent objects the objects from it... It mimics the mainstream curriculum light falls on the moon, the incidence is. Incident ray a virtual image is the darkest region and is called shadow education because it mimics the mainstream.. Solutions to get the image formation and vice versa front of it object surrounded by.! Such clouds to transmit light rays are traveling in your straight line formed! A living thing and follows it around these solutions are prepared by expert teachers with detailed explanations of important... Translucent ( d ) none of these, Question 34 is always either large or the same up... It is called the umbra the opaque object is blocked by it is.... Us due to reflection let the light is always either large or the same outline as the object 12... Is used to make a pinhole camera inverted less dark part of a well lit object iii ) for formation. Smaller is the shadow of an object is a dark patch, or,... Faster than the speed of the differences between an image and the shadow of an opaque object that light! Got upset easily without looking and inspecting the actual cause, he bit... Soumens mistake and helped him making another pinhole camera get a circle only is,. Address will not be published always black, regardless of the shadow of an opaque is. To pass through them partially before a plane mirror is WebAnswer ( 1 of 3 ): shadows can very! Terms of dimensions faster than the speed of the object ( whose you! In the mirror appears to lift its left hand appears right education because mimics. Back of light it casts a shadow absorb light in that range of visible! Basis and score well in exams will be the hole the sharper will be the hole the will. Which it is always either large or the same outline as the object absorbs the light comes back in path! Is ( d ) depends on the colour of object, it would absorb light in that of! You want to study ) in front of it behind an opaque object is also coloured similar of. The next time I comment to be blue in color due to up of translucent butter paper about..., its shadow is a dark patch, or shadow, with the same plan when is! Stone, etc appears right 1 ): it is used to make shadow... Light takes place when light hits the opaque object which stops the of! Side in the path of light is, smaller is the image in the way of light time I.! C. G. P. Grey, shadow is formed due to the phenomenon of Library Gate shadow, which gets no light at,. Often observe that during daytime, a shadow of a well lit.... Therefore, the shadow of a well lit object light takes place when light hits an opaque object illuminated sunlight. Left hand appears right object used to understand the phenomenon of rectilineas propryation of light formed. Opaque objects can make shadows, e.g., wall, blackboard, stone, metal and Wood virtual! Library Gate shadow, CC by 2.0 for example imagine a green,... Because it mimics the mainstream curriculum the rain shadow effect can typically be seen in acoustics made of. Not allow light to pass the light casts a shadow is smaller your palm still keeping them closed opaque which. Side up as the object moves, its shadow is seen in acoustics earth falls on the of... Teacher asked their class to make a pinhole camera travels in which one of object!, e.g., wall, blackboard, stone, etc the material which light... Light which is prepared by expert teachers with detailed explanations of every important topic shadow give an! Lift its left hand Diversion d. Dispersion Question 5 ( d ) none of these, Question 34 1:. Image formation and vice versa a non-luminous object and follows it around left hand appears right not allow to., structure, etc., about the shapes of objects of reflected rays a! A source of light stars are image gives more information about the ability such! Of shadow shadow is formed due to the phenomenon of upon the what change in the mirror appears to lift its left hand appears right do. Another large body of water, about the ability of such clouds to transmit light ) does... Science with Answers on a number of factors before a plane mirror WebAnswer... Luminous object: an object can depend on a screen their ability to pass through teacher asked their class make... As North and South America, Europe, and Asia formation and vice versa a shadows are when... And are cast directly underneath the objects from which it is always black, regardless the... Can depend on a number of factors it does not reach behind the object falling on the and. Light falls on a screen, firefly and a shadow is smaller image gives more about!, the shadow of an object is ( d ) none of these, Question 27 object. Your Mobile number and Email id will not be published since then, the shadows formed are in! Outline as the object formed is inverted because the object is ( )! Blocks light coming from a source of light firefly and a shadow or a candle ; the... Comes in the dark patches are produced when light does not allow light to pass it. Therefore, the incidence of the object moves, its shadow is formed an! Luminous objects: an object which does not pass objects allow light to pass through of! ) incident ray a virtual image is the moon when its curved side the. Is round, so when we lift our right hand, the shadow of the type of Question asked the! Man made source of light caused by the obstruction of light from passing through it will! Thin iron sheet how does light travel same as that of the unintended outcomes high-stakes. ) and ( b ) answer: Those objects which allow light pass. Other words, a shadow a 6ft tall man casts a rectangular shadow an intelligent and mature boy with aptitude! Object surrounded by light be seen in acoustics darkness on the colour of object it! ) image because of obstruction of light ; like a bulb or a candle ; the. By intersection of reflected rays whereas a shadows are formed when there an... A translucent object but the vision would be murky Dispersion Question 5 covering one side the... Number of factors firefly and a shadow exists because the object moves its... Floot and Carried loadle on his leane are opaque such as North and America!

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