Question 7. (c) Do you experienced such superstition in your life? For this, take a cylindrical tube; which can be easily bent. The sun, firefly, stars and fire. (d) a zig-zag line, Question 18. (b) Sun That is why mirrors reflect most of the light falling on it. A shadow is always formed on the side opposite to the source of lightwith respect to an opaque object. Moon is a non-luminous body though it glows. Question 14. All the space behind the opaque object up to some distance behind it seems to be filled with the shadow. Shadows give us information about the Question 5. Question 25. 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. Moon is a non-luminous body though it glows. (b) a random way A shadow is formed when a transparent object comes in the way of light. What is a shadow? On dark nights a little illumination by moon enables us to see things around us. The shadow of an object is erect i.e same side up as the object. What type of images is formed by it? Answer: A smooth shining surface, which rebounds the light back in same or in different direction is called a mirror. Question 5. Question 26. What type of images are formed by a pinhole camera? Which one of the following is the natural source of light? One can see clearly through these objects. Shadow is formed due to the phenomenon of rectilineas propryation of light. Light is the energy that enables us to see. When an opaque object is placed in its way, a dark patch is formed behind the object. (c) translucent The effective embedded material volume on the bending side of the rivet determines the strength of the Since then, the incidence of the disease has been sporadic. (b) erect Objects that do not give out or emit light of their own are called Communication back in the 1860s was pretty primitive. Image is seen when light coming from the object after What is the difference between image and shadow?Answer: Question 6. The word penumbra originated from the Latin word paene which means almost or nearly. It is important for the students to go through these NCERT solutions to get knowledge of the type of question asked in the chapter. An object which does not have its own light is called a non-luminous object, e.g., chair, moon, etc. The unlighted area is called the shadow. (b) opaque object 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. A torch is a Explain its construction and image formation. Substances through which light can pass partially and things cannot be seen clearly through them are light does not bend its path of propagation if the size of the obstructing object is not comparable to the wavelength of light. An opaque object blocks the light falling on it. (c) sun Example: Sun. Answer: Wood and bricks are the substances through which light does not pass. 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. Shadow vs Reflection. Justify. A rain shadow forms when moist winds head towards a set of mountains and get forced upwards by them. The shape and size of an objects shadow is affected by the positioning of the light source. The human monkeypox virus (MPXV) was first identified in 1959. 2. (c) translucent (d) none of these, Question 12. Air and water are translucent objects. Question 1. (iii) For the formation of shadow there must be Name four natural luminous bodies. The position of the shadow changes with 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. The difference between shadow and reflection is that a shadow is formed by the blocking of light rays by any object. 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. 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 22. Question 2. Stars are Question 29. (a) luminous The sun radiates ultraviolet radiations that could be extremely harmful for our eyes. 4. WebAerial photograph interpretation is a method of extrapolating geological details of the ground surface from aerial images. Answer: A shadow is a dark outline or image cast by an opaque object that blocks light coming from a source of light. An opaque object casts a dark shadow behind it because it prevents the light completely. Answer: In a dark room, we can see with torch light which goes straight. (c) translucent objects (a) Pencil animed annimals reat to carey fis leado. (c) opaque object The part of the shadow which occurs in the centre is called penumbra. The dark patch formed behind an opaque object is called a shadow. Reflection b. Rectilinear propagation c. Diversion d. Dispersion Question 24. 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. Question 3. On the basis of this experience, state whether your eyelids are transparent, translucent or opaque. (c) opaque Light travels in a curved line. 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. The object which does not have light of its own is Compare it with your image as you see it in a mirror. The ray of light that falls on a plane mirror is called It is approx 1500 km away from us then also it brightens all universe. Question 21. Example: Sun, bulb, etc. Only opaque objects can make shadows, e.g., wall, blackboard, stone, etc. : Earth, trees, Transparent objects allow light to pass through them without getting scattered. A shadow has the following three characteristics: A very interesting phenomenon occurs when an object forms an image by reflection. Answer: Answer: The light comes back in the same plan when light falls on a shiny surface. Question 11. (d) none of these, Question 4. Solid wax is Does the colour of the object affect the colour of the shadow? No light enters the eye from the shadow of the object. Penumbra is the less dark part of a shadow. Which of the following are transparent or allows light to pass through it? Shadow formation. Parthivs grandmother looked a little worried today. Answer: Security mirrors 3. When l = 0.75 or 1, the material flows to the inside of the rivet, and a vortex phenomenon also occurs. (c) star Class 6 Science Chapter 11 Light: Shadows And Reflections Questions and Answers PDF, Class 6 Science Chapter 11 Light: Shadows And Reflections Extra Questions, Image is formed due to reflection or refraction of light. The phenomenon of formation of shadows of celestial bodies on one another is called an eclipse. Example: Sun. We can clearly see through a transparent object. Lateral inversion. Question 12. We consider moon as non-luminous body but still we can see things on a full moon night. Fill in What happens when light falls on a mirror? The term rain shadow is also used in such a context. Example: Sun, bulb, etc. 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. This property of light is called rectilinear propagation of light. Benign tumors may similarly appear as a shadow or a spot. Answer: The silvered glass has a smooth surface and the smoothness helps in forming clear image. The size of shadow totally depends on distance between object Answer: Question 18. of the object. Whether a shadow is two-dimensional or three-dimensional? Close your eyes while looking towards bright sunshine. (a) reflected ray __________ helps us to see objects. Question 9. Printer is used to print in the computer. Question 20. Far the source of light is, smaller is the shadow. Black thick paper is translucent. Question 10. Question 17. We cannot see through an opaque object. It basically describes the scarcity of rain in an area. (a) shape of the light source Answer: All these questions are very important from examination point of view. Question 4. On the other hand, The sky appears to be blue in color due to the same property. The image formed by a plane mirror is erect but laterally inverted. A shadow basically is a sort of image produced when light is blocked. Give suitable examples of each objects. Answer: A cylinder object can cast shadows in two ways. The increase of size and movement is also true if the distance between the object of. Answer: Answer: Distinguish between luminous and non-luminous objects? This dark patch is called shadow. (b) straight line The shape of shadow depends upon the Objects which does not allow light to pass through them are called This concept is well proved with a smaller size of shadow in the evening and noon and bigger size of shadow in the morning. A smooth, polished reflecting surface is called a mirror. Example: Sun, bulb, etc. Answer: When a beam of light falls on a rough surface, it is turned back in different directions, it is called scattering of light. For example: wood, stone, etc. The endemic regions were identified in Africas central and western areas. How does the colour of an opaque object affect the colour of the shadow? The most famous story of acoustic shadows effect on human history occurs not once, but pretty frequently throughout the Civil War, causing many historians to assert that this phenomenon had a significant impact on its outcome. This phenomenon of bouncing back of light is known as reflection. This results in an area of darkness appearing behind the object. Why we do not obtain upside-down image of the Sun through a pinhole camera? step 2: Conclusion, When the moon comes in between the sun and the earth, the shadow of the moon falls on the earth. Luminous: A piece of red hot iron, a lighted fluorescent tube, the flame of a gas burner, a lighted torch, sun, firefly. The working of a pinhole camera is based on the property of _________ propagation of light. there is an opaque object in the way of light. The objects which have light of their own are called luminous objects such as torch, bulb, burning candle, etc., whereas non-luminous objects does not have light of their own and can be seen only when light falls on them such as table, wall, book, etc. Light travels in a straight line. The following three things are required for a shadow to form: A shadow will not form if any of these is absent. These two regions in shadows are formed when an opaque body is placed in front of an extended or slit source. Match the items given in column I suitably with those given in column II. Answer: Answer: This is something all of us must have noticed while seeing ourselves in the mirror. 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. The formation of shadow of one celestial body on the other is known as Luminous objects: An object which has a tendency to produce light are known as luminous objects. Why is the image formed in a pinhole camera inverted? Any surface that is really well polished or shiny acts like a mirror. Answer: When a ray of light falls on a smooth and shiny surface, the whole of light is sent back in the same medium. Even if you look around you then you will find many things that have shadows such as trees, buildings, furniture etc. aberrations. (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. Non - Luminous Object: An object which does not have a tendency to produce light known as a non-luminous object. Question 2. (iii) Which types of objects do not allow light to pass through them? Question 14. A shadow is formed when an opaque object is placed in the path of light. (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. Natural Source of Light: Source of light which is already present in nature known as natural source of light. about 384,402 km or 238,856 mi. From the experiment below we will prove that light travels in a straight line i.e path covered by light is alway straight. As when light falls on an object, light gets reflected and this reflected light comes to us which makes the object visible. We know that light propagates in a straight line i.e. We cannot see through an opaque object. What is reflected ray? Since May 2022, Answer: 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 Answer: Answer: (d) none of these, Question 29. It is time to put your knowledge to the test by answering a few questions. Give four examples of non-luminous objects. Is always black, regardless of the colour of the object. Answer: In a pinhole camera, image formed is inverted because the object is between radius of curvature and focus. Aim: To observe differences between the image and the shadow of the same object. The objects which allow light to pass through them are called PlantsAnimalsHuman BodyPhysicsChemistryQuiz. Answer: Shadow of an object is always Question 3. WebThis forms areas that are lighted, and an area that isn't. The word antumbra originated from Latin word ante which means before. objects do not allow light to pass through them. Save my name, email, and website in this browser for the next time I comment. What is this called? Question 9. (b) Sun (c) Sun Question 2. (d) Wood, Question 13. These are the objects through which one cannot see properly. (a) Transparent objects: Objects through which light can pass easily are called transparent objects, e.g., clean glass, clean water, clean air, etc. 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. He rectified Soumens mistake and helped him making another pinhole camera. 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. A translucent object also creates a faint area of darkness. Method: Go out during the day and study your shadow. Any explicit account of perception requires a commitment to one of a variety of ontological or metaphysical views. A shadow exists because the object absorbs the light. (a) transparent (c) Electric light The main reason behind this is due to the Rayleigh scattering. From the critical perspective, this study investigated the role of private tutoring in a context of high-stakes testing through Interpretative (d) translucent, Question 7. We can see through a translucent object but the vision would be murky. (c) both of these (c) a straight line (b) A thin paper sheet Answer: Translucent: A sheet of polythene, smoke, a sheet of plane glass, fog, a sheet of cellophane, a wire mesh. Answer: We may say that clouds behave as translucent object. (c) Opaque objects: Objects through which light cannot pass at all and through which we cannot see are called opaque objects. Shadow is all about one part of a visual scene being darker than another. Question 1: Rearrange the boxes given below to make a sentence that helps us understand opaque objects. (d) Soumen got upset easily without looking and inspecting the actual cause, he is bit careless in doing his activity. Shadow is formed when light falls on the opaque body. 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