It is a form of energy which makes objects visible as we cannot see objects in darkness. Does the colour of the object affect the colour of the shadow? A shadow is formed when there is a source of light. Source of light which is already present in nature known as natural source of light. Question 1. It works on the principle that light travels in a straight line. Since the man and the tree is on the same surface they must be facing the same elevation angle from the light source. The opaque obstructing object is capable of blocking the light coming from sun. 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. __________ helps us to see objects. Your Mobile number and Email id will not be published. A shadow is formed when an opaque object is placed in the path of light. there is an opaque object in the way of light. Your email address will not be published. Question 20. The sky appears to be blue in color due to the same property. (c) white If the observer is located within an umbra, then the observer is likely to perceive a total eclipse. 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. This is known as arectilinear propagation of light. (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. But he was unable to get the image of a well lit object. The horizontal distance (in kilometers or miles) at which a large dark object can just be seen against the horizon sky in daylight. there is an opaque object in the way of light. Diffusion of light. Reflection b. Rectilinear propagation c. Diversion d. Dispersion 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. Justify. We cannot see through an opaque object. image. Question 18. An object having its own light is called a luminous object, e.g., torch, sun, etc. This is called lunar eclipse. (a) transparent It can cause a shadow on chest X-rays. Why? Question 31. 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(a) A thin sheet of paper(b) A thin glass slab(c) A thin iron sheet(d) All of these, (v) Bouncing back of light from shining surfaces is called, (a) Reflection(b) Refraction(c) Bending(d) Dispersion, (a) Image becomes inverted(b) Image bends laterally(c) Right of the object appears left of the image(d) All of these happen, Answer: (c) Right of the object appears left of the image. Question 26. Question 13. To know more about Light Energy, visit the link below; Light takes the quickest path between any two points. (d) What value of Parthiv is shown here? The phenomenon due to which light returns back after striking a highly polished surface is called _________ of light. PlantsAnimalsHuman BodyPhysicsChemistryQuiz. 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 glass sheet having a polished, shiny, smooth and reflective surface on the other side is called a mirror. Question 8. (b) He made a larger hole instead of a fine hole. Moon does not have light of its own. (d) Parthiv is an intelligent and mature boy with scientific aptitude. Question 4. (d) none of these, Question 16. We can clearly see through a transparent object. (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. However, the infection started to spread in 2017 to non-endemic regions such as North and South America, Europe, and Asia. Shadow vs Reflection. Pinhole cameras consist of a closed box having a small pinhole in the front and having translucent screen at the back. (b) erect Shadows are formed when an object stops light. Candle, bulb, kerosene oil, lamp and torch. What is an eclipse? Answer: Once the tube is bent at some angle, it is not possible to see the source of light through it. 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. This explains why we cannot see a shadow in the dark. (d) none of these, Question 5. Why is a silvered glass used as a mirror? Answer: So it is a non-luminous body. The human monkeypox virus (MPXV) was first identified in 1959. (c) Sun that allows you to see things is called as light. Virtual images cannot be obtained on a screen. Question 3. On which property of light a pinhole camera does work? Answer: Moon does not emit light of its own. Classify Objects Based on its Light Producing Property? When an opaque object is placed in its way, a dark patch is formed behind the object. 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. 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. For this, take a cylindrical tube; which can be easily bent. Sun rays falling on a flying bird form shadow in space. A shadow comes from within a living thing and follows it around. Liquid matter: Water is made up of liquid. (d) a zig-zag line, Question 18. . Question 9. Question 10. An object which does not allow light at all to pass through it, is called opaque object, e.g., wooden sheet, wall, etc. The image formed by a pinhole camera is erect. (c) Yes, many a times by my grandmother. Question 7. 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. the light ray falling on the opaque object is blocked by it. It is used to view objects like trees and buildings. Question 23. : glass, Translucent objects allow light to pass through them partially. Example: Sun. All these questions are very important from examination point of view. (d) all of these, Question 38. In pinhole camera, the image is free from spherical and . (c) both of these 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. What is mirror? Example: bulb, candle, torch, etc. the light ray falling on the opaque object is blocked by it. 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. of light. Question 20. (b) size of object Ans. What is a transparent object? Images gives more information about the objects such as colour, structure, etc., whereas shadows do not provide such information. As when light falls on an object, light gets reflected and this reflected light comes to us which makes the object visible. However, the infection started to spread in 2017 to non-endemic regions such as North and South America, Europe, and Asia. Answer: It is time to put your knowledge to the test by answering a few questions. Required fields are marked *. Question 7. Question 2. We can see through a translucent object but the vision would be murky. Why is the moon not considered as a luminous body? Answer: (a) a curved line 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. WebAerial photograph interpretation is a method of extrapolating geological details of the ground surface from aerial images. an opaque object in the way of light, and. Translucent Object: An object which allows partial passage to light is called a translucent object. Write down four man-made sources of light.Answer: Question 14. Shadow is formed due to a. Rectilinear propagation of light. Question 5. This is called solar eclipse. [1] Estimations of other elements, such as the outline and dimension of features, can be supported by the shadow element. Light, Shadows and Reflections Class 6 notes - Chapter 11 - BYJUS 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 word antumbra originated from Latin word ante which means before. animed annimals reat to carey fis leado. (viii) Which is a device to image the sun? (a) transparent Why is silvered glass used as a mirror? Question 18. Umbra refers to the innermost region of the shadow that appears to be the darkest. (a) planets Can you think of a situation where we can see the path of the light? The unlighted area is called the shadow. Natural Source of Light: Source of light which is already present in nature known as natural source of light. (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. Answer: Shadow is not just the two-dimensional outline that you see on the ground. Answer: On the basis of the experience, we observe our eyelids are opaque. (c) both (a) and (b) Question 22. (d) all of these, Question 39. Answer: An object which comes to the path of light is called an obstacle. The colour of opaque objects affect the dark colour of the shadow. Let a beam of light pass through the comb on the mirror using a torch. It is the outer part of a shadow. (d) translucent, Question 7. Plywood sheet is a/an Objects that do not give out or emit light of their own are called 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. (d) diminished, Question 21. (a) Torch WebShadow is formed due to the phenomenon of rectilinear propagationof light. Light travels in a straight line. (d) Wood, Question 13. Its all about contrast. (c) light bulb Translucent: A sheet of polythene, smoke, a sheet of plane glass, fog, a sheet of cellophane, a wire mesh. This creates an area of darkness on the side of the object away from the source of light. (a) Pencil Question 14. WebAnswer (1 of 3): Shadows can be very deceptive. Based on the size of the light, the sharpness of shadow is observed. Shadows are formed because the movement of particles travels in light. Similar to the sunlight, the particles travel and choose a destination. If the destination is an opaque substance, it creates a blurred image based on the object's size. Shadow is formed by an object by obstructing light so that it doesnt reach a surface. Light is a form of energy which when falls on the object enables us to see them. (a) transparent object The light ray which returns after striking a smooth surface is called incident ray. 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. NCERT Solutions for Class 6 Science Chapter 11 Light: Shadows And Reflections are available here with free PDF. If an opaque (solid) object gets in the way, it stops light rays from traveling through it. The images formed by a pinhole camera are upside down, i.e., inverted image. 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. Question 12. Image formed by plane mirror is A shadow subjugates the entire three-dimensional volume of light approaching an object from behind. How does light travel? What is a shadow? When a ray of light hits a surface it looses some energy, which depends on the surface material. That is why mirrors reflect most of the light falling on it. WebChromatids are condensed into tight structures, mitotic spindle starts to form Prometaphase (Mitosis) - centrosomes move to opposite sides of cell, forming spindle poles, spindle fibers interact with sister chromatids, kinetochore micro grow from 2 poles to capture sister chromatids, spindle is fully formed. In this article, we will discuss about shadow formation, umbra and penumbra, characteristics of shadows. Question 19. What are luminous and non-luminous objects? The object is required to be opaque for shadow formation to take place. Security mirrors 3. The colour of the shadow is always black. Light travels in a curved line. shailjarathore Answer: The area of shade formed by the obstruction is called the geometrical shadow. (c) Do you experienced such superstition in your life? surface. Cellophane sheet is . (d) beam of ray. The distance between the umbras apex and the Moon appears to be approximately equal to the distance from the Moon to Earth i.e. (a) transparent 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? Correct Answer: Sun and Earth. Answer: 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) none of these, Question 14. The dark patch formed behind an opaque object is called a shadow. On this screen is a dark patch, or shadow, with the same outline as the object surrounded by light. A shadow has the following three characteristics: A very interesting phenomenon occurs when an object forms an image by reflection. Question 17. 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. Give four examples of transparent objects. Source of light which is prepared by humans is known as man made source of light. (c) Opaque Only opaque objects can make shadows, e.g., wall, blackboard, stone, etc. Name some artificial source of light. Refer to the Light Shadows and Reflection Class 6 MCQs Questions with Answers here along with a detailed explanation. Shadow is formed due to the phenomenon of rectilineas propryation of light. Which of the following is a luminous object? Transparent Object: An Object through which light is completely passed known as transparent object. An acoustic shadow refers to a space or area where the propagation of direct sound is occluded or blocked or diverted to another area. Answer: Moon is a non-luminous body because it shines by reflecting the sunlight falling on it. (c) incident ray (c) translucent Why do we need a shiny surface for reflection? Question 11. What is the size of the image formed by a plane mirror? It is only a dark region having no colour. 13.4): a source of light; an opaque object; a screen or irface behind the object. 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 Question 11. (b) non-luminous It works on the principle that light travels in a straight line. 1. In this case, the shadows formed are smaller in length and are cast directly underneath the objects mostly. (b) reflection (b) translucent Air and water are translucent objects. Answer: Sun and Venus c. Earth and Venus d. Earth and stars 4. For a round body that obstructs around source of light, the umbra formed has the shape of a right circular cone. Light falls on the hole, and an inverted image is formed on the side opposite to the hole. It is called shadow education because it mimics the mainstream curriculum. WebA shadow is formed when there is a source of light. Question 9. The images formed by a pinhole camera are upside down (inverted images). WebShadows are made by blocking light. A torch is a [1] [6] It can be used for the analysis of some small village houses. Question 7. Answer: Mirror does not change the direction of light that falls on it. When the moon comes in between the sun and the earth, the shadow of the moon falls on the earth. (b) Glass It is formed when light hits the opaque object which does not let the light pass through. How are moon and planets visible to us, though they are not luminous? Define opaque objects with example. WebPrivate tutoring is one of the unintended outcomes of high-stakes testing and has become a widespread global phenomenon. (iii) Which types of objects do not allow light to pass through them? Lateral inversion. Answer: Fill in (a) Plane mirror(b) Pinhole camera(c) A straight pipe(d) Glass slab. (d) none of these, Question 12. (b) Why do you think that some people believe that these eclipses will have some bad effect on them? b. 11. Shadow of an object is The effective embedded material volume on the bending side of the rivet determines the strength of the It is called Refraction which means that light bends as it goes through water this bending of the light can create a illusion where there may be a shadow BELOW the glass of water but the actual light going THROUGH the water is refracted into a different direction which can create the shadow which is not cast by the water. 12. The size of shadow totally depends on distance between object and source of light. Image is seen when light coming from the object after (iv) Which is an example of a translucent 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. 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