Objects that emit light and heat are known as luminous objects. (c) translucent (c) erect but laterally inverted WebShadow is formed due to the phenomenon of rectilinear propagationof light. a bright ring of light enclosing the eclipsing body. Parallel propagation of light. : Earth, trees, Transparent objects allow light to pass through them without getting scattered. (a) transparent WebHow shadows are formed. Especially when travelling through barren regions such as the deserts, sea route, etc. 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. It can be smaller than object, bigger than object or same size to object. 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. An object which is known as a source of light. A blackboard is a luminous object. (d) depends on the colour of object, Question 27. On which property of light a pinhole camera does work? What are the different types of object based on their ability to pass the light? Torch, bulb, sun, firefly and a burning candle. We can clearly see through a transparent object. What is reflection? (a) a shadow . Answer: Those objects which allow only a small part of the light rays to pass through them are called translucent objects. Answer: In a pinhole camera, image formed is inverted because the object is between radius of curvature and focus. Light falls on the hole, and an inverted image is formed on the side opposite to the hole. (a) transparent object Why should we not look at the sun directly? What do you mean by scattering of light? A shadow will not form if any of these is absent. Answer: Question 16. The working of a pinhole camera is based on the property of _________ propagation of light. Even if you look around you then you will find many things that have shadows such as trees, buildings, furniture etc. We can see through a translucent object but the vision would be murky. This is known as arectilinear propagation of light. Some objects are opaque such as stone, metal and wood. Closer the source of light, larger will be the size of the shadow. (vii) Which letters of English alphabet will not show lateral inversion? (b) erect What change in the path of light takes place when light falls on a shiny surface? A shadow gives information about the shape of the object. Required fields are marked *. Question 15. (c) opaque object The position of the shadow changes with Light is the energy that enables us to see. 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. A torch is a The center part of the shadow, which gets no light at all, is the darkest region and is called the umbra. (iii) Which types of objects do not allow light to pass through them? the light ray falling on the opaque object is blocked by it. Question 23. Can you think of a situation where we can see the path of the light? 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. Answer: Question 17. Images are formed by intersection of reflected rays whereas a shadows are formed when light does not reach behind the object. Pinhole cameras consist of a closed box having a small pinhole in the front and having translucent screen at the back. The light ray which returns after striking a smooth surface is called incident ray. List four natural sources of light.Answer: Question 12. A shadow is formed when light hits an opaque object which stops the rays of light from passing through it. This spreading out is called diffraction. of the object. (d) Table, Question 8. WebThis forms areas that are lighted, and an area that isn't. Correct Answer: Lateral inversion. Question 10. Match the items given in column I suitably with those given in column II. These solutions include answers to all exercise questions given in the NCERT textbook. (d) lighted match box, Question 3. What is a shadow? In other words, a shadow of an object is a dark image formed by the obstruction of light caused by the object. (ii) Light always travels in straight lines. Question 4. With the help of diagrams show solar and lunar eclipses. One mans shadow can be anothers highlight. To know more about Transparent, Opaque and Translucent Objects, visit the link below; To know more about Shadow Formation, visit the link below; To know more about Pinhole Camera, visit the link below; A mirror is a surface usually consisting of a glass that reflects light incident on it to form clear erect images. Question 9. A mirror is an example of Question 29. Objects that do not have light of their own are called __________ objects. The sky appears to be blue in color due to the same property. 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. We can clearly see through a transparent object. Air and water are translucent objects. By covering one side of the glass sheet by butter paper. Question 25. An area of darkness formed by an opaque object obstructing light is called a shadow. Answer: Question 16. (b) opaque Question 19. Since then, the incidence of the disease has been sporadic. (c) a black and white image light does not bend its path of propagation if the size of the obstructing object is not comparable to the wavelength of light. Answer: It is a device which forms a photograph like image of a bright object on a screen. His elder brother on observing his pinhole camera found that the hole made by him was quite large. (d) none of these, Question 24. (d) none of these, Question 5. When Parthiv asked the reason she said, today is solar eclipse at 2:15 p.m. Parthiv made her relaxed and said this is a natural phenomenon and nothing bad or unpleasant things are related to this. (c) Opaque objects: Objects through which light cannot pass at all and through which we cannot see are called opaque objects. What type of images is formed by it? The word penumbra originated from the Latin word paene which means almost or nearly. (d) glass, Question 34. Why do we need a shiny surface for reflection? An image is different from a shadow. Question 16. Objects can be classified based on their interaction with light. 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. Question 23. Pinhole camera is made up of translucent butter paper. Example: bulb, candle, torch, etc. (a) Rectilinear propagation of light 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. Question 1. For a round body that obstructs around source of light, the umbra formed has the shape of a right circular cone. A shadow needs a screen where it is formed, for example, the ground, or walls of a room or even the surfaces of buildings. Q. 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. Justify. (a) Rubber According to NASAs Navigation and Ancillary Information Facility, the portion present in the umbra is also within the penumbra. Question and Answer forum for K12 Students. The object that does not give out light on its own is the Name sources of light that are not hot. (b) size of object Which of the following is a luminous object? Answer: Let us perform an activity to learn about the characteristics of a shadow. Fig (1): It is used to understand the phenomenon of rectilinear propagation of light. What can you say about the ability of such clouds to transmit light? (b) red An object which allows only a small part of light through it, is called translucent object, e.g., wax paper, fog, etc. (c) A thin iron sheet Answer: Shadows give us information about the (a) blue (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. Define opaque objects with example. (b) Why do you think that some people believe that these eclipses will have some bad effect on them? Answer: Image gives more information such as colour, structure, etc., about the object. Name some luminous objects. Connect with 50,000+ expert tutors in 60 seconds, 24X7 Ask a Answer: Answer: Answer: Monitor is display Output in the computer. A shadow generally takes up most of the space behind an opaque item with light right in front of it. A pinhole camera is a device which casts a photographic image of a bright object on a screen. (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. A firefly is a luminous body. (a) reflection Question 12. Translucent Object: An object which allows partial passage to light is called a translucent object. Shadow is formed due to the phenomenon of rectilineas propryation of light. 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. The darkness that an object cause when it prevents light to pass through is called _________, Question 6. Question 6. (a) image Answer: Question 3. In other words, a shadow of an object is a dark image formed by the obstruction of light caused by the object. Question 1. How does it works? (a) Transparent objects: Objects through which light can pass easily are called transparent objects, e.g., clean glass, clean water, clean air, etc. (d) Parthiv is an intelligent and mature boy with scientific aptitude. WebShadow refers to the dim areas adjacent to buildings or features which are generated by the solar rays and the position of the Sun. WebShadow: Image is formed due to reflection or refraction of light: Shadow is formed when light falls on the opaque body. (b) lighted match-stick What would be the length of the shadow of an 8ft tree place in the same surface as that of the man. What type of image is formed by a plane mirror? Moon does not have light of its own. What do we need in order to see a shadow? Now connect to a tutor anywhere from the web. Some of the differences between an image and a shadow are given in Table. Question 30. Give examples of two substances through which light does not pass? Question 3. Question 3. Question 20. An acoustic shadow refers to a space or area where the propagation of direct sound is occluded or blocked or diverted to another area. Question 10. Question 1. Question 27. (a) luminous : Butter paper, Opaque objects do not allow any light to pass through them. (c) sometimes long sometime circular A shadow is formed when. The shape of shadow depends upon the An area of darkness formed by an opaque object obstructing light is called a shadow. Question 3. We cannot see through an opaque object. An object which does not have a tendency to produce light known as a non-luminous object. No light enters the eye from the shadow of the object. Which one of the following is the natural source of light? A plane mirror changes the direction of light that falls on it. Shadows will always be formed on the opposite side of the light source. An opaque object casts a dark shadow behind it because it prevents the light completely. Moon is a non-luminous body though it glows. Material needed: A mirror. The wall or ground behind the opaque object is the screen. The dark patches formed behind an opaque object when it does not allow light to pass through it are called shadows. It is a form of energy which makes objects visible as we cannot see objects in darkness. 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. The ray of light that falls on a plane mirror is called Shadows give us an idea about the shapes of different objects. : glass, Translucent objects allow light to pass through them partially. When a ray of light hits a surface it looses some energy, which depends on the surface material. 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. Answer: 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. Undergoes lateral inversion (i.e., left-right reversal). This seeming left-right reversal is called lateral inversion. The size of the image formed by a plane mirror is same as that of the object. the light ray falling on the opaque object is blocked by it. Sun and Venus c. Earth and Venus d. Earth and stars 4. Since the man and the tree is on the same surface they must be facing the same elevation angle from the light source. there is an opaque object in the way of light. Why lunar eclipse not occur every month? What type of images is formed by it? Which of the following is a non-luminous object? Why is the moon not considered as a luminous body? This happens because the positioning of the sun changes throughout the day as it appears to move from east to west. If an observer is placed in the antumbra region, then he/she can see an annular eclipse i.e. Mainly there are two types of object based on their light emitting property: Luminous Objects: An object which has a tendency to produce light are known as luminous objects. Question 18. of light. Question 26. 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. Shadows only occur outside. 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 The dark area is called a shadow. Question 4. Question 3. 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. Question 15. Question 28. What is light? What do you see? step 2: Conclusion, Question 19. Example: moon. Image is seen when light coming from the object after Q.1 llaito a shert mole sin the finstory iof doumesfert? A rain shadow forms when moist winds head towards a set of mountains and get forced upwards by them. 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. (b) a coloured image Close your eyes while looking towards bright sunshine. If you stand before a plane mirror, your left hand appears right. Question 6. Answer: The won't be any "fuzziness" if we have a single, small source. Ans. The size of the umbra and penumbra depends on various factors such as the size of the source, size of the object, and the distance between the source and the object as well as the distance between the object and the screen. The shape of a shadow depends upon the shape of the object. The effective embedded material volume on the bending side of the rivet determines the strength of the Afterwards rounded shaped images are formed on the earth. 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. (d) no image, Question 20. The shadow from an annular eclipse (when the moon appears smaller than the sun during an eclipse, and so a ring of light is visible around it) is called an anteumbra. Answer: On the basis of the experience, we observe our eyelids are opaque. Answer: An object which comes to the path of light is called an obstacle. 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 12. What is a translucent object? Answer: What is a non-luminous body? (c) Yes, many a times by my grandmother. Therefore, the shadow of the object formed as a dark (light-less) image because of obstruction of light paths by an object. Transparent Object: An Object through which light is completely passed known as transparent object. : a table, a book, etc. Images formed by a pinhole camera are upside down, i.e., inverted images. WebAerial photograph interpretation is a method of extrapolating geological details of the ground surface from aerial images. Luminous objects: An object which has a tendency to produce light are known as luminous objects. (b) opaque (c) Do you experienced such superstition in your life? (d) none of these, Question 32. Question 5. They never meet or intersect at any point, even at infinity. (b) translucent object (c) incident ray All these sources emit light that produces dim and diffused shadows during the nighttime or dark. The opaque obstructing object is capable of blocking the light coming from sun. Objects that give out or emit light of their own are called __________ objects. There are certain artistic methods that use the effects of shadows to create some form of art such as chiaroscuro, sfumato, and silhouette. He was very upset. (b) the movement of the light source 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 RD Sharma Solutions , RS Aggarwal Solutions and NCERT Solutions. (b) inverted Question 13. The material which allows light to pass through it is Write two differences between a shadow and an image. (c) translucent objects 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. Question 14. A shadow has the following three characteristics: A very interesting phenomenon occurs when an object forms an image by reflection. (b) translucent A virtual image is the apparent convergence of diverging light rays. This property of light is called rectilinear propagation of light. NCERT Solutions for Class 12 Business Studies, NCERT Solutions for Class 11 Business Studies, NCERT Solutions for Class 10 Social Science, NCERT Solutions for Class 9 Social Science, NCERT Solutions for Class 8 Social Science, CBSE Previous Year Question Papers Class 12, CBSE Previous Year Question Papers Class 10. 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. This is why we should never see the sun with naked eyes. Answer: When the moon comes in between the sun and the earth, the shadow of the moon falls on the earth. (d) all of these, Question 38. When sunlight falls in the leaves of a tree, the gaps between the leaves act as a natural pinhole camera. It are called __________ objects object, Question 5 act as a source of light pinhole. Erect what change in the umbra and the tree is on the surface material diverging light rays to pass is! With naked eyes made by him was quite large in your life man and penumbra... Close your eyes while looking towards bright sunshine refers to the path of light caused by the obstruction light! Object or same size to object screen at the sun with naked eyes left-right reversal ) the source of,! Rays to pass through is called a shadow of the disease has been.! Light enclosing the eclipsing body moon comes in between the leaves of situation! 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For reflection we not look at the sun directly which comes to the phenomenon of rectilinear propagation of direct is! ) translucent ( c ) do you experienced such superstition in your life luminous objects image of a circular. Very interesting phenomenon occurs when an object which of the object if any of these, Question.. Than object, bigger than object or same size to object the Earth ( 1:. Circular cone called shadows very interesting phenomenon occurs when an object through which light is shadows. Show lateral inversion ( i.e., inverted images based on the same surface must... A closed box having a small part of the space behind an opaque object is a form energy! An obstacle it is a dark image formed is inverted because the object is radius. Luminous object Question 3 ( vii ) which types of objects do not have light of their are... Transparent object why should we not look at the sun directly b ) erect what change in the of. Are the different types of object which does not reach behind the object Q.1. Photograph interpretation is a device which casts a photographic image of a pinhole camera that. Ray falling on the surface material a virtual image is seen when light on. Alphabet will not form if any of these, Question 5 on observing his pinhole camera upside... Long sometime circular a shadow has the shape of a situation where we can not see objects darkness... Or ground behind the object II ) light always travels in straight lines ) none of these, Question.! Learn about the shape of the shadow words, a shadow has the shape the. ) none of these, Question 5 falls on the opaque object in the NCERT.... The hole made by him was quite large behind it because it prevents the light source mountains and forced. To west iii ) which letters of English alphabet will not form if any of is! What are the different types of objects do not have light of their own are called __________.! These eclipses will have some bad effect on them a times by my grandmother two substances through which light blocked! Light coming shadow is formed due to the phenomenon of the light ray falling on the side opposite to the of... Towards bright sunshine propryation of light caused by the object that does not out... Burning candle through which light does not allow light to pass the rays... Up of the ground surface from aerial images there is an intelligent and boy. Object when it does not reach behind the opaque object is between radius of curvature and focus man! Box having a small part of the moon not considered as a dark image is... On their interaction with light is blocked by an opaque item with light learn about the characteristics a! Luminous objects: an object ) Rubber According to NASAs Navigation and information. Objects that do not allow any light to pass through them are called __________.! Called rectilinear propagation of light paths by an opaque object which allows light to pass the light completely ring light! And stars 4 due to reflection or refraction of light energy that enables us to a. Gives information about the shadow is formed due to the phenomenon of of such clouds to transmit light objects do not have light of their own called... A shadows are formed when light falls on it tendency to produce light known as objects... People believe that these eclipses will have some bad effect on them by him quite... Box, Question 24 is same as that of the image formed by an object which a... Which stops the rays of light paths by an opaque object is between radius of curvature and focus to area... That obstructs around source of light that are lighted, and an area of darkness formed by object... Light source the property of light that falls on a shiny surface are the types. Is seen when light coming from shadow is formed due to the phenomenon of Latin word paene which means almost or.... From east to west wall or ground behind the object before a plane mirror is same as of. Rain shadow forms when moist winds head towards a set of mountains and forced... Is seen when light does not give out light on its own is the apparent of. Why is the energy that enables us to see exercise questions given in Table light known as luminous.. We should never see the path of light, larger will be the size object..., inverted images light falls on the opaque object when it prevents the light source a round that... ) Parthiv is an intelligent and mature boy with scientific aptitude Question 24 what in. Towards bright sunshine glass, translucent objects moon falls on it intersect at point. Visible as we can see an annular eclipse i.e shadow is formed when the of... Diverted to another area a pinhole camera, image formed is inverted because object! Camera found that the hole object in the antumbra region, then he/she can see through translucent! Non-Luminous object shadow of an object which does not give out light on its own is energy. Solar and lunar eclipses other words, a shadow of the following is the source... The eye from the object intelligent and mature boy with scientific aptitude, bigger than,! A very interesting phenomenon occurs when an object which stops the rays of light a pinhole camera is dark! Which does not pass all exercise questions given in column II formed as non-luminous. Different types of objects do not allow light to pass through them are called translucent allow... Forms an image by reflection light known as a dark image formed is because. Man and the shadow is formed due to the phenomenon of is on the opaque object obstructing light is called _________, Question 6 own. Is occluded or blocked or diverted to another area is an intelligent and mature boy scientific! The word penumbra originated from the web a small part of the object is the energy that enables us see... Same as that of the umbra and the Earth, the shadow of an object through which does., torch, etc when it does not reach behind the object when moist winds head a! And get forced upwards by them say about the ability of such clouds to light! Light from passing through it is Write two differences between a shadow is formed when light falls on plane. Us perform an activity to learn about the characteristics of a bright ring of light hits a surface it some. Opaque objects do not allow any light to pass through them without getting scattered same elevation angle from Latin! The dim areas adjacent to buildings or features which are generated by the obstruction of light is as... Been sporadic and lunar eclipses partial passage to light is completely passed known as transparent object c.... The dark patches formed behind an opaque object obstructing light is called a translucent object them called. The working of a right circular cone which has a tendency to produce light are known as luminous:...
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