Answer: The objects which emit light of their own are called luminous bodies, e.g., the sun, the stars, etc. Answer: Question 4. 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. (b) translucent A shadow comes from within a living thing and follows it around. It is time to put your knowledge to the test by answering a few questions. Example: moon. Right side of the object appears to be left in image and vice-versa. Question 12. (b) shape of object On the basis of this experience, state whether your eyelids are transparent, translucent or opaque. The size of shadow totally depends on distance between object 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. Survelliance mirror, Your Mobile number and Email id will not be published. Have you ever made the shadows of different animals like dogs, camels or butterflies with your hands on the wall of your room? while tracing paper is . Ans. 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. (b) lighted match-stick Extra Questions for Class 6 Science Chapter 11 Light Shadows and Reflection with Answers Solutions. What is light? (a) reflected ray . Liquid matter: Water is made up of liquid. Answer: We need the following in order to see a shadow. 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. Is always black, regardless of the colour of the object. An object which allows only a small part of light through it, is called translucent object, e.g., wax paper, fog, 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. Question 24. What is the difference between image and shadow?Answer: Question 6. Question 10. The generation of complex multicolored shadows is observed by visual artists that generally arise from colored light emitted or reflected back from different sources. If we try to view the object and the source from the apex of the cone, then the two bodies would seem to be of the same size. : a table, a book, etc. Answer: He rectified Soumens mistake and helped him making another pinhole camera. The colour of the opaque object does not affect the colour of the shadow that is formed. (a) shining mirror Learn from their 1-to-1 discussion with Filo tutors. A shadow generally takes up most of the space behind an opaque item with light right in front of it. Example: bulb, candle, torch, etc. Even if you look around you then you will find many things that have shadows such as trees, buildings, furniture etc. 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. In fact most shadows are not totally black because light usually bounces around the obstruction off other objects. As we know, the length of the shadow is proportional to the cotangent of the angle of elevation, we can say that. (a) Translucent(b) Opaque(c) Transparent(d) Penumbra. This is the reason we can see objects in a pinhole camera. Question 4. Objects that emit light and heat are known as luminous objects. The image formed in water is Any explicit account of perception requires a commitment to one of a variety of ontological or metaphysical views. A shadow is formed only when light rays are blocked by an opaque object. List four natural sources of light.Answer: Question 12. E.g. Question 14. Solution For Shadow is formed due to the phenomenon of rectilineas propryation of light. Answer: Transparent objects are Spectacles.Opaque objects are A stone, wood, a heap of salt, dense smoke, and membrane of tabla.Translucent objects are Blood, milk, wax, skin, balloon, rubber. Answer: Answer: Source of light which is already present in nature known as natural source of light. Ans. Light is the energy that enables us to see. It can cause a shadow on chest X-rays. (c) long Compare it with your image as you see it in a mirror. (a) dark (black) (ix) Which of the following is a cold source of light? Write down the similarities and differences. 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. Answer: Moon is a non-luminous body because it shines by reflecting the sunlight falling on it. All these solutions are prepared by expert teachers with detailed explanations of every important topic. A building having the height of 20m casts a shadow on the ground. 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 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. Used as a rear mirror 2. (c) The finer will be the hole the sharper will be the image formation and vice versa. Features of Image Formed Due to Reflection. A plane mirror changes the direction of light that falls on it. (a) Rectilinear propagation of light Answer: The extent of reflection depends upon the shine and smoothness of the surface. How is it formed? Now connect to a tutor anywhere from the web. WebA shadow refers to a dark real silhouette of a person or an opaque object that is generated when the object or person obstructs the light coming from a light source. (d) none of these, Question 31. Since May 2022, It glows due to reflection of sunlight by it. Question 1. and . For example, consider a TV screen. What can you say about the ability of such clouds to transmit light? Required fields are marked *, Chapter 11: Light Shadows And Reflections, Frequently asked Questions on CBSE Class 6 Science Notes Chapter 11: Light Shadows and Reflections. Since May 2022, For this, take a cylindrical tube; which can be easily bent. This enables us to see images. (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 always formed on the side opposite to the source of lightwith respect to an opaque object. It is called shadow education because it mimics the mainstream curriculum. Silvering makes it shiny and the shiny surface helps in reducing the absorption. Shadow is formed by an object by obstructing light so that it doesnt reach a surface. (d) shape of object, Question 28. Question 17. WebSun and Venus. Now, cover the eyes with your palm still keeping them closed. The shadow we see while in the path of totality is called the umbra, and the shadow of the surrounding partial eclipse is a penumbra. Lateral inversion. What are transparent objects? A blackboard is a luminous object. A shadow is formed when. objects do not allow light to pass through them. How does it works? The word penumbra originated from the Latin word paene which means almost or nearly. (a) Firefly (Jugnu)(b) Tube light(c) The sun(d) Electric bulb. Question 1. (b) non-luminous Image gives more information such as colour, structure, etc., about the object. (d) A thin wooden sheet, Question 17. Turn on the torch and place the object (whose shadow you want to study) in front of it. When its curved side faces the shining object, it casts a rectangular shadow. Question 10. Question 24. (d) Moon, Question 2. Question 26. Save my name, email, and website in this browser for the next time I comment. During reflection angle of incidence is equal to angle of reflection. (a) transparent objects (a) When the earth, moon and sun are in a straight line, with moon in between, the shadow of moon falls on the earth and this is known as solar eclipse. The area in shadow appears black because there is no light falling on it. (b) non-luminous Question 30. A shadow refers to a dark real silhouette of a person or an opaque object that is generated when the object or person obstructs the light coming from a light source. surface. c. Passing of light through object d. All of these. (c) eclipse Answer: It basically describes the scarcity of rain in an area. A shadow is formed when an opaque object comes in the path of light. Question 7. Your Mobile number and Email id will not be published. What is the colour of the image formed by a plane mirror? Black thick paper is translucent. This is known as arectilinear propagation of light. Question 8. Do you notice any difference? Moon is a non-luminous body though it glows. Web(i) Shadow: A dark patch formed behind an opaque body, when placed in the path of light. Shadow is formed due to the phenomenon of rectilineas propryation of light. 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. Non - luminous object: An object which does not have a tendency to produce light known as a non-luminous object. A Pin-hole Camera A pin-hole camera is just a box with a very tiny hole on one of its sides. In this case, the shadows formed are smaller in length and are cast directly underneath the objects mostly. Question 3. 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. Question 20. Question 2. Question 16. This is known as reflection of light. With the increase in distance between the object and the surface of projection the size of the shadow or the silhouette increases. Example: moon. Answer: Wood and bricks are the substances through which light does not pass. The objects which allow light to pass through them are called Features of Image Formed Due to Reflection: Ans. Answer: It is a device which forms a photograph like image of a bright object on a screen. (b) non-luminous This obstruction results in the formation of a dark (light-less) image of the object that is termed as the shadow of the object. WebPrivate tutoring is one of the unintended outcomes of high-stakes testing and has become a widespread global phenomenon. What type of images is formed by it? Man Made Source of Light: Source of light which is prepared by humans is known as man made source of light. (b) transparent objects Question 5. The position of the shadow changes with On this screen is a dark patch, or shadow, with the same outline as the object surrounded by light. Answer: No, to see the reflection, source of light is required. (a) the position of the light source Try to see a source of light; like a bulb or a candle; through the straight tube. Download Filo and start learning with your favourite tutors right away! The images formed by a mirror are erect and laterally inverted. (c) opaque When the object moves, its shadow is likely to expand in terms of dimensions faster than the speed of the objects movements. The endemic regions were identified in Africas central and western areas. In the picture above, we can see that the shadow of an opaque object (ball) is formed on the screen when the object is placed in front of an extended source of light. The human monkeypox virus (MPXV) was first identified in 1959. 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. From the experiment below we will prove that light travels in a straight line i.e path covered by light is alway straight. That is why mirrors reflect most of the light falling on it. Aim: To obtain a shadow and study its characteristics Materials needed: A torch, a few small opaque objects of different shapes and sizes and a white screen (a piece of cardboard covered with white paper). Give four examples of translucent object. (d) none of these, Question 40. Question 3: Can you think of creating a shape that would give a circular shadow if held in one way and a rectangular shadow if held in another way? (d) none of these, Question 10. Which types of objects do not allow light to pass through them? We can see through a translucent object but the vision would be murky. The pinhole image of the sun is rectangular. No light enters the eye from the shadow of the object. Required fields are marked *. Shadow is formed due to the phenomenon of rectilineas propryation of light. Shadows are formed when an _________ object comes in the path of light. 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