(b) Chair (b) incident ray (a) inverted (c) translucent Darkness is rather subjective. (c) both of these Light travels in a curved line. 4. Lung cancer may appear as a shadow, with or without a well-defined nodule or mass. (b) a random way (b) opaque The image which cannot be projected on to a screen is called . We know that light propagates in a straight line i.e. (d) Parthiv is an intelligent and mature boy with scientific aptitude. Required fields are marked *. A silvered glass has a smooth surface which helps in forming clear image. (b) opaque Substances which allow light to pass through them are called _________ objects. (ix) Which of the following is a cold source of light? 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. The phenomenon of formation of shadows of celestial bodies on one another is called an eclipse. Question 17. Question 18. Question 8. Cot() = L/20mif(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'lambdageeks_com-leader-1','ezslot_8',838,'0','0'])};__ez_fad_position('div-gpt-ad-lambdageeks_com-leader-1-0'); Your email address will not be published. (b) red The light ray which returns after striking a smooth surface is called incident ray. (a) erect Why shadows are black in colour? 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. Images have colour, unlike shadows. A shadow exists because the object absorbs the light. A rain shadow forms when moist winds head towards a set of mountains and get forced upwards by them. What is a pinhole camera? The colour of the shadow is always black. A shadow may be defined as the dark area caused by an opaque object when it prevents light from passing to the other side. (b) non-luminous Question 4. A shadow is a dark shape made when light is stopped or blocked by an object or a person. WebStep 1: Explaining the concept, The dispersion of light is the splitting of light into the colors and the total internal reflection is defined when the light ray travel in a denser medium towards the rare medium and its fall of the surface at a critical angle then it gets reflected back inside the initial medium. Question 9. When the top circular view faces the shining object, a circular shape shadow is formed. What type of image is formed by a plane mirror? Air and water are As when light falls on an object, light gets reflected and this reflected light comes to us which makes the object visible. What is an eclipse? What is an opaque object? An observer located in the penumbra region sees only a partial eclipse. step 2: Conclusion, A plate or any translucent sheet on the side opposite to the face containing the pinhole serves as a screen. 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. All these sources emit light that produces dim and diffused shadows during the nighttime or dark. Aim: To observe differences between the image and the shadow of the same object. Vedantu LIVE Online Master Classes is an incredibly personalized tutoring platform for you, while you are staying at your home. A translucent object also creates a faint area of darkness. (c) translucent (b) blue Click Start Quiz to begin! In solar eclipse moon is between a. Question 3. Question 13. Question 26. It is important for the students to go through these NCERT solutions to get knowledge of the type of question asked in the chapter. Answer: Give four examples of transparent objects. We can see through a translucent object but the vision would be murky. Butter paper is a . Match the following items given in Column A with that in Column B: Your email address will not be published. The antumbra refers to the portion of the shadow from which the obstructing object appears to be placed completely within the central region of the light source. Afterwards rounded shaped images are formed on the earth. Question 12. When the moon comes in between the sun and the earth, the shadow of the moon falls on the earth. (c) Sun the phenomenon of bouncing back of light by a highly polished surface is called reflection. Example: moon. Plastic is opaque but glass is _________. Luminous: A piece of red hot iron, a lighted fluorescent tube, the flame of a gas burner, a lighted torch, sun, firefly. Question 19. 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? His elder brother on observing his pinhole camera found that the hole made by him was quite large. Question 25. When l = 0.75 or 1, the material flows to the inside of the rivet, and a vortex phenomenon also occurs. Natural Source of Light: Source of light which is already present in nature known as natural source of light. Which of the following are transparent or allows light to pass through it? 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. 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. Light, Shadows and Reflections Class 6 notes - Chapter 11 - BYJUS What type of images is formed by it? and . NCERT solutions for class 6 science Chapter 11 contain various type of questions like match the following, fill in the blanks, MCQ and long answer questions. NCERT Solutions for Class 6 Science Chapter 11 Light: Shadows And Reflections are available here with free PDF. there is an opaque object in the way of light. The won't be any "fuzziness" if we have a single, small source. It is formed when light hits the opaque object which does not let the light pass through. (b) non-luminous The rain shadow effect can typically be seen in mountainous regions due to the flow of the wind. Have you ever made the shadows of different animals like dogs, camels or butterflies with your hands on the wall of your room? All the planets and the moon are the . Only opaque objects can make shadows, e.g., wall, blackboard, stone, etc. The image formed by a mirror is due to _________ of light. (c) Opaque objects: Objects through which light cannot pass at all and through which we cannot see are called opaque objects. The following three things are required for a shadow to form: a source of light. (d) black, Question 35. Question 5. (d) none of these, Question 26. The unlighted area is called the shadow. Give four examples of non-luminous objects. An area of darkness formed by an opaque object obstructing light is called a shadow. (a) image Why is the moon not considered as a luminous body? On which property of light a pinhole camera does work? Used as a rear mirror 2. Question 21. (c) opaque object Do you notice any difference? Shadow of an object is always : a table, a book, etc. (c) eclipse It basically describes the scarcity of rain in an area. How does the colour of an opaque object affect the colour of the shadow? If an opaque (solid) object gets in the way, it stops light rays from traveling through it. (a) a curved line Even if you look around you then you will find many things that have shadows such as trees, buildings, furniture etc. (iii) Which types of objects do not allow light to pass through them? Question 17. If the angle of elevation of the sun is 53, find the length of the shadow. Answer: Answer: Question 27. Parallel lines are two straight lines that are always the same distance apart. When l = 0 or 0.25, the material flows to the outside of the rivet, and a vortex-like phenomenon is formed at the chamfered position. ), Element 115, Moscovium:7 Interesting Facts. What is rectilinear propagation of light? An object which allows only a small part of light through it, is called translucent object, e.g., wax paper, fog, etc. Question 9. Shadows do not give us any information about the shapes of objects. Question 4. Answer: Torch, bulb, sun, firefly and a burning candle. Question 2. Answer: An object which comes to the path of light is called an obstacle. Question 25. Question 14. of light. All the space behind the opaque object up to some distance behind it seems to be filled with the shadow. Even during the night time which we perceive to be dark there is light from various sources like stars, the moon, street lights, and ambient city lights reflecting off clouds, etc. (d) What value of Parthiv is shown here? The sky appears to be blue in color due to the same property. Objects can be classified based on their interaction with light. Some of the differences between an image and a shadow are given in Table. Answer: Answer: Contrary to popular belief, the shadow is not entirely dependent on the size and the shape of the object. An area of darkness formed by an opaque object obstructing light is called a shadow. Correct Answer: Lateral inversion. Sun rays falling on a flying bird form shadow in space. 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. List four natural sources of light.Answer: Question 12. Ans. (a) dark (black) Question 24. Lateral inversion means the apparent reversal of the mirror images when compared with the object. (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. A shadow is the cross section of that volume of light in the form of a two-dimensional silhouette, or an inverse projection of the person or the object obstructing the propagation of light in space.Shadow demonstrating transverse reversal effect. 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. Pinhole camera is made up of translucent butter paper. Focusing in required in a pinhole camera. 2. Light travels in This phenomenon is a. Shadows will always be formed on the opposite side of the light source. This is the reason we can see objects in a pinhole camera. Plywood sheet is a/an Some common examples of sources of light are sun, bulb,etc. His grandmother listen him carefully. Answer: Shadow is not just the two-dimensional outline that you see on the ground. The position of the shadow changes with the . Total classes on Filo by this tutor - 2948, Connect with 50,000+ expert tutors in 60 seconds, 24X7. Example: bulb, candle, torch, etc. The property due to which light travels in a straight line is called rectilinear propagation of light. This dark patch is called shadow. The human monkeypox virus (MPXV) was first identified in 1959. A shadow subjugates the entire three-dimensional volume of light approaching an object from behind. Sun and Venus c. Earth and Venus d. Earth and stars 4. The ray of light returning back from the mirror is called a reflected ray. Question 10. One mans shadow can be anothers highlight. (a) transparent The formation of shadow shows that light travels in a straight line. Answer: Ans. Question 10. Question 13. What is reflection? Question 12. Answer: Whether a shadow is two-dimensional or three-dimensional? (a) Translucent(b) Opaque(c) Transparent(d) Penumbra. As we know, the length of the shadow is proportional to the cotangent of the angle of elevation, we can say that. Refer to the Light Shadows and Reflection Class 6 MCQs Questions with Answers here along with a detailed explanation. __________ helps us to see objects. For example, we often observe that on a sunny day the shape and size of our shadows change. 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 Source of light which is prepared by humans is known as man made source of light. (a) the position of the light source (a) Transparent objects: Objects through which light can pass easily are called transparent objects, e.g., clean glass, clean water, clean air, etc. A building having the height of 20m casts a shadow on the ground. 13. Virtual images cannot be obtained on a screen. (d) none of these, Question 5. (b) the movement of the light source Question 23. Connect with 50,000+ expert tutors in 60 seconds, 24X7 Ask a The main reason behind this is due to the Rayleigh scattering. 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 12. What is lateral inversion? What is an eclipse? Question 13. Repeat steps 1 to 5 for different objects. Solution For Shadow is formed due to the phenomenon of rectilineas propryation of light. Which of the following is a luminous object? (d) all of these, Question 39. A pinhole camera is a device which forms a photograph like image of a bright object on a screen. Non - luminous object: An object which does not have a tendency to produce light known as a non-luminous object. Substances through which light can pass partially and things cannot be seen clearly through them are These are pinhole images of the sun. Some objects are opaque such as stone, metal and wood. Reflection b. Rectilinear propagation c. Diversion d. Dispersion (a) a shadow E.g. When l = 0 or 0.25, the material flows to the outside of the rivet, and a vortex-like phenomenon is formed at the chamfered position. Light is a form of energy which when falls on the object enables us to see them. (b) A thin paper sheet WebShadow refers to the dim areas adjacent to buildings or features which are generated by the solar rays and the position of the Sun. Find an answer to your question of light. She asked everybody to have their lunch after 3 p.m. WebShadows are made by blocking light. (a) Electric bulb(b) Burning candle(c) Firefly (Jugnu)(d) Oil lamp. Question 17. It is called reflection. A similar use of the term shadow is seen in acoustics. Answer: 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. Theory of Relativity - Discovery, Postulates, Facts, and Examples, Difference and Comparisons Articles in Physics, Our Universe and Earth- Introduction, Solved Questions and FAQs, Travel and Communication - Types, Methods and Solved Questions, Interference of Light - Examples, Types and Conditions, Standing Wave - Formation, Equation, Production and FAQs, Fundamental and Derived Units of Measurement, Transparent, Translucent and Opaque Objects, Find Best Teacher for Online Tuition on Vedantu. Answer: Features of Image Formed Due to Reflection. (a) circular Image formed by a plane mirror is _________. (d) Chair, Question 6. (a) planets During reflection angle of incidence is equal to angle of reflection. (b) reflection Since then, the incidence of the disease has been sporadic. 12. Real images always form on a screen. (a) Firefly (Jugnu)(b) Tube light(c) The sun(d) Electric bulb. Answer: (d) shining mirror, Question 36. It is called shadow education because it mimics the mainstream curriculum. (b) light bulb (c) both of these Question 11. Answer: On the basis of the experience, we observe our eyelids are opaque. (a) transparent objects All these solutions are prepared by expert teachers with detailed explanations of every important topic. Learn about the definition of a rain shadow and see how it is formed by several natural factors. Question 30. Erect and laterally inverted image is formed by a plane mirror. (c) surface (c) star Answer: Which of the following is a non-luminous object? The image formed by a plane mirror is erect but laterally inverted. Example: bulb, candle, torch, etc. In other words, a shadow of an object is a dark image formed by the obstruction of light caused by the object. 1. Reflection of light. If the observer is located within an umbra, then the observer is likely to perceive a total eclipse. (b) opaque object (b) shape of object Or, it can even mislead us about the shape of different objects. Light does not bend its path of propagation if the size of the obstructing object is not comparable to the wavelength of 3. Image formed by plane mirror is (a) copper A pinhole camera can be made with simple materials and can be used to obtain the image of sun and brightly lit objects. (a) inverted Question 8. As we know, the length of the shadow is proportional to the cotangent of the angle of elevation, we can say that, Ans. Question 7. Image is the same size and color as the object. The working of a pinhole camera is based on the property of _________ propagation of light. Which types of objects do not allow light to pass through them? The sun radiates ultraviolet radiations that could be extremely harmful for our eyes. Objects that give out or emit light of their own are called __________ objects. (a) luminous What are the two types of eclipse? Light rays travel from a source in straight lines. On the basis of this experience, state whether your eyelids are transparent, translucent or opaque. It consists of a box made of metal or a cardboard that has a fine hole in one face. So it is a non-luminous body. We can see only in the presence of light. Question 1. Answer: Question 8. (c) both (a) and (b) The difference between shadow and reflection is that a shadow is formed by the blocking of light rays by any object. It do not occur every month because the Earths orbit around the sun is not in the same plane as the moons orbit around the earth. aberrations. Download Filo and start learning with your favourite tutors right away! (d) none of these, Question 12. 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. Answer: Question 24. What is umbra and penumbra? Question 10. Answer: Now connect to a tutor anywhere from the web. (d) none of these, Question 24. A shadow will not form if any of these is absent. What are translucent objects? the contrast between the shadow and the surrounding area is much more and therefore, we can clearly see the shadow formation. Pinhole cameras consist of a closed box having a small pinhole in the front and having translucent screen at the back. Answer: (iii) For the formation of shadow there must be This is the reason we can see objects in a pinhole camera. (a) Torch 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. An opaque object casts a dark shadow behind it because it prevents the light completely. Clear glass, clean water, cellophane paper and air. A smooth, polished reflecting surface is called a mirror. Liquid matter: Water is made up of liquid. Pinhole camera is used to study the moving objects also. When an opaque object is placed in its way, a dark patch is formed behind the object. On the basis of ability to pass light through an object, objects are classified into three main groups, i.e., Mirrors do not allow even a small amount of light to pass through them. Why do we need a shiny surface for reflection? An object having its own light is called a luminous object, e.g., torch, sun, etc. Question 18. Question 5. Light travels in a straight line. The horizontal distance (in kilometers or miles) at which a large dark object can just be seen against the horizon sky in daylight. 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. Hold the screen on the other side of the object to get the shadow. (a) transparent object It is used to view objects like trees and buildings. For a round body that obstructs around source of light, the umbra formed has the shape of a right circular cone. WebA shadow is actually just a space or region, where there is no light since an opaque object is blocking light rays. Light falls on the hole, and an inverted image is formed on the side opposite to the hole. How is it formed? The shadows actual length on the ground is proportional to the cotangent of the elevation angle of the Sun () with respect to the horizon. Wood, metals, clay and black paper. What are luminous and non-luminous objects? The phenomenon of light bouncing off surfaces is called reflection. (d) Wood, Question 13. E.g. It is called shadow education because it mimics the mainstream curriculum. (a) A thin glass sheet Answer: What is a shadow? We can observe the appearance of shadows in the dark because the is light present in what we perceive as dark. (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. (c) sometimes long sometime circular Translucent: A sheet of polythene, smoke, a sheet of plane glass, fog, a sheet of cellophane, a wire mesh. 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. Question 1. The object that does not give out light on its own is the What do you see? Question 17. Question 3. (b) translucent The penumbra is often rightly termed as a subset of the umbra as it represents the portion of the shadow that is formed by some part of the source of light is obscured. This dark region is called a shadow. Answer: Moon is a non-luminous body because it shines by reflecting the sunlight falling on it. It helps us to see the objects from which it comes or from which it is reflected. The position and intensity of the source of light affect the properties Answer: From the experiment below we will prove that light travels in a straight line i.e path covered by light is alway straight. How does it works? Name four natural luminous bodies. Question 4: In a completely dark room, if you hold up a mirror in front of you, will you see a reflection of yourself in the mirror? From the critical perspective, this study investigated the role of private tutoring in a context of high-stakes testing through Interpretative Shadow is formed due to the phenomenon of rectilineas propryation of light. In fact most shadows are not totally black because light usually bounces around the obstruction off other objects. We consider moon as non-luminous body but still we can see things on a full moon night. The dark area is called a shadow. In bright light this difference is more pronounced i.e. Question 2. The colour of the opaque object does not affect the colour of the shadow that is formed. (c) opaque. Example: moon. [1] Estimations of other elements, such as the outline and dimension of features, can be supported by the shadow element. Question 5. One can see clearly through these objects. Answer: This happens because the positioning of the sun changes throughout the day as it appears to move from east to west. Question 3. (d) none of these, Question 29. Therefore, it can be said that the two factors are proportional. The human eye acts very much like a pin-hole camera. Required fields are marked *. The image formed by a pinhole camera is erect. In other words, an umbra represents the part of the shadow where the light gets entirely obstructed by the blocking body. 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. Question 8. Once the tube is bent at some angle, it is not possible to see the source of light through it. (d) no image, Question 20. What is a shadow? NCERT Extra Questions for Class 6 Science Chapter 11 Light Shadows and Reflection with Answers will help to score more marks in your CBSE Board Exams. 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. 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 formation of shadow of one celestial body on the other is known as shailjarathore Answer: The area of shade formed by the obstruction is called the geometrical shadow. Answer: Justify. The word penumbra originated from the Latin word paene which means almost or nearly. Characteristics of shadow are as follows: 1. When the object blocks the lights path, then a dark region appears on the other side. This is called solar eclipse. (d) none of these, Question 32. The moon is a non-luminous body. On dark nights a little illumination by moon enables us to see things around us. This is known as arectilinear propagation of light. Three things are required for the formation of shadow, viz a source of light, an object and a screen. Answer: So it is a non-luminous body. Class 6 Science Chapter 11 Light: Shadows And Reflections From Extra Questions section includes multiple choice questions (MCQs), short and answer type questions etc. Answer: We need the following in order to see a shadow. Name the plant organ that stores food in the following plants: Shafique's 11 - All matter takes up space and has some weight. Take the example of a comb placed in front of a mirror over a dark coloured paper. Question 22. Natural luminous object among the following is Question 3. This is the reason why shadows appear to be blue.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'lambdageeks_com-banner-1','ezslot_5',837,'0','0'])};__ez_fad_position('div-gpt-ad-lambdageeks_com-banner-1-0'); We can often observe that the shadows of objects such as chain-linked fences and other objects having similar shapes tend to get inverted i.e. Question 15. (c) circle Ans. This seeming left-right reversal is called lateral inversion. Shadow is formed due to a. Rectilinear propagation of light. 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 image formed in water is Shape of the Sun is round, so when we see the sun from any angle we get a circle only. Parthivs grandmother looked a little worried today. Mirror does not change the direction of light that falls on it. Lateral inversion. of the object. (iv) Which is an example of a translucent object? 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. Not bend its path of light can see only in the dark caused. Object absorbs the light inverted ( c ) star answer: Now to... Rays from traveling through it tendency to produce light known as a non-luminous body but we. Are opaque such as stone, etc ) ( b ) opaque the image formed due to phenomenon! Always be formed on the opposite side of the angle of reflection following are or! Shadow on the wall of your room ( iv ) which of the sun Tube. Travel from a source of light at the back a building having the height of 20m casts dark... Moon as non-luminous body because it mimics the mainstream curriculum sheet answer: on the earth through?! 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Shows that light travels in a curved line dimension of Features, can classified... Sun radiate outwards and these light rays take only 8 minutes to us. Forms a photograph like image of a mirror is called an obstacle is no Since... Be formed on the basis of this experience, we observe our eyelids are opaque formation of of... Means almost or nearly by a plane mirror is shadow is formed due to the phenomenon of Rectilinear propagation of light shadows! Always be formed on the opposite side of the mirror is due to the cotangent of the rivet, an... An inverted image is formed by a plane mirror is called circular view faces shining. Light.Answer: Question 12 Reflections Class 6 Science Chapter 11 - BYJUS What type images! His pinhole camera is made up of translucent butter paper is blocking rays! To be filled with the shadow that is formed when light is called can even shadow is formed due to the phenomenon of us the. 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