A Pin-hole Camera A pin-hole camera is just a box with a very tiny hole on one of its sides. Question 7. (b) Sun Right side of the object appears to be left in image and vice-versa. This explains why we cannot see a shadow in the dark. This spreading out is called diffraction. We cannot see through an opaque object. Air and water are Is always black, regardless of the colour of the object. Can you think of a situation where we can see the path of the light? The part of the shadow which occurs in the centre is called penumbra. In this case, the shadows formed are smaller in length and are cast directly underneath the objects mostly. Answer: The extent of reflection depends upon the shine and smoothness of the surface. (a) I, O, U(b) N, Z, X(c) I, X, E(d) A, E, I. RD Sharma Solutions , RS Aggarwal Solutions and NCERT Solutions. Answer: 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. (a) transparent Contrary to popular belief, the shadow is not entirely dependent on the size and the shape of the object. A shadow is formed when an opaque object comes in the path of light. This obstruction results in the formation of a dark (light-less) image of the object that is termed as the shadow of the object. It consists of a box made of metal or a cardboard that has a fine hole in one face. Liquid matter: Water is made up of liquid. The dark patches formed behind an opaque object when it does not allow light to pass through it are called shadows. Light does not bend its path of propagation if the size of the obstructing object is not comparable to the wavelength of light. When a ray of light falls on an opaque object, a dark patch is formed on the other side of the object whether it is on ground or it is on screen present on the other side of the object. Sometimes, you are able to see the Sun or the Moon behind the clouds. (d) none of these, Question 32. Question 19. Answer: We may say that clouds behave as translucent object. Answer: 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. This is the reason we can see objects in a pinhole camera. It is called shadow education because it mimics the mainstream curriculum. Question 19. Question 18. The effective embedded material volume on the bending side of the rivet determines the strength of the 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. When a ray of light falls on a surface like glass which has shiny and glossy properties from where light gets reflected. Answer: The won't be any "fuzziness" if we have a single, small source. (a) transparent In other words, a shadow of an object is a dark image formed by the obstruction of light caused by the object. Answer: All these questions are very important from examination point of view. The center part of the shadow, which gets no light at all, is the darkest region and is called the umbra. It helps us to see the objects from which it comes or from which it is reflected. When light is incident on a surface, it gets reflected or it bounces back. When sunlight falls in the leaves of a tree, the gaps between the leaves act as a natural pinhole camera. During reflection angle of incidence is equal to angle of reflection. What is natural pinhole camera? One mans shadow can be anothers highlight. (a) transparent This is known as reflection of light. Question 6. 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. (c) long Reflection of light. 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? Lateral inversion. Learn from their 1-to-1 discussion with Filo tutors. (d) shape of object, Question 28. The image formed in water is What are the essential conditions for formation of shadows? (b) size of object Now, cover the eyes with your palm still keeping them closed. 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. The shape of a shadow depends upon the shape of the object. Answer: (d) shining mirror, Question 36. 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. (a) star Correct Answer: Lateral inversion. (a) Plane mirror(b) Pinhole camera(c) A straight pipe(d) Glass slab. What are incident ray and reflected ray? An object having its own light is called a luminous object, e.g., torch, sun, etc. (a) reflection Source of light which is prepared by humans is known as man made source of light. 1. The images formed by a pinhole camera are upside down (inverted images). In areas where the amount of received rain is low or the area is very dry, the term rain shadow is used to describe the place with the dominant wind direction, elevation and other factors that keep the area dry. Question 20. Image formed by a pinhole camera is A shadow is formed when there is a source of light. (d) diminished, Question 21. (b) size of the object Question 2. The colour of the opaque object does not affect the colour of the shadow that is formed. Eventually, we can observe that if the height of the fence is not enough, then the pattern of light would move towards the shadow diamonds and light outlines. The term Shadow is frequently used for any form of obstruction or blockage and not just the obstruction of light. (b) opaque object But he was unable to get the image of a well lit object. Answer: Question 12. (d) Moon, Question 2. E.g. Non - Luminous Object: An object which does not have a tendency to produce light known as a non-luminous object. (b) lighted match-stick Question 24. Mirror does not change the direction of light that falls on it. Why is a silvered glass used as a mirror? Classify Objects Based on its Light Producing Property? The unlighted area is called the shadow. Question 28. (d) none of these, Question 9. Example: bulb, candle, torch, etc. Answer: (c) erect but laterally inverted Question 16. Now, Soumen can see the image of the object. An object which is known as a source of light. Printer is used to print in the computer. In a plane mirror our left hand looks like right hand. Shadows are formed when an _________ object comes in the path of light. Plywood sheet is a/an 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. Question 8. Question 27. (d) Soumen got upset easily without looking and inspecting the actual cause, he is bit careless in doing his activity. Answer: Answer: This is called lunar eclipse. (d) a zig-zag line, Question 18. Question 3. Question 18. Example: bulb, candle, torch, etc. Q.9) If you stand before a plane mirror, your left hand appears right. Do you notice any difference? Luminous: A piece of red hot iron, a lighted fluorescent tube, the flame of a gas burner, a lighted torch, sun, firefly. (d) none of these, Question 5. Translucent Object: An object which allows partial passage to light is called a translucent object. Images have colour, unlike shadows. (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. 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? Question 12. Hold the screen on the other side of the object to get the shadow. Question 10. On the same side if the incidence angle is bigger, the shadow is smaller. What is light? (b) incident ray What type of images is formed by it? (d) none of these, Question 4. An observer located in the penumbra region sees only a partial eclipse. The image formed by a mirror is due to _________ of light. Question 12. 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. (b) Why was Soumen unable to get the image of a well lit object? Have you ever made the shadows of different animals like dogs, camels or butterflies with your hands on the wall of your room? Question 12. (a) Firefly (Jugnu)(b) Tube light(c) The sun(d) Electric bulb. An object which allow light to pass through it, is called transparent object, e.g., clear glass, water, etc. Question 9. A plane mirror changes the direction of light that falls on it. In bright light this difference is more pronounced i.e. (a) a shadow Pinhole cameras consist of a closed box having a small pinhole in the front and having translucent screen at the back. How is it formed? Your email address will not be published. A translucent object also creates a faint area of darkness. Frosted glass, wax paper, greased paper and butter paper. (x) Out of these, which one is not a man-made luminous body? Light falls on the hole, and an inverted image is formed on the side opposite to the hole. What is mirror? Answer: Answer: A plate or any translucent sheet on the side opposite to the face containing the pinhole serves as a screen. Light travels in a curved line. 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. On the basis of ability to pass light through an object, objects are classified into three main groups, i.e., It is called shadow education because it mimics the mainstream curriculum. All these sources emit light that produces dim and diffused shadows during the nighttime or dark. Answer: In a pinhole camera, image formed is inverted because the object is between radius of curvature and focus. (a) What is solar eclipse? Image formed by plane mirror is Since May 2022, Answer: Question 4. E.g. 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. Explain its construction and image formation. When l = 0.75 or 1, the material flows to the inside of the rivet, and a vortex phenomenon also occurs. Moon does not emit light of its own. If the observer is located within an umbra, then the observer is likely to perceive a total eclipse. These are pinhole images of the sun. Mirrors show regular and complete reflection. Answer: A cylinder object can cast shadows in two ways. We know that light propagates in a straight line i.e. (a) Pencil Question 1. When an object is placed in front of a light source, we get a shade or dark region behind it, known as the shadow. (c) translucent Since then, the incidence of the disease has been sporadic. Vedantu LIVE Online Master Classes is an incredibly personalized tutoring platform for you, while you are staying at your home. Question 14. Answer: 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 ray of light returning back from the mirror is called a reflected ray. Question 17. This dark Light is a form of energy which enables us to see. (d) none of these, Question 29. Answer: The objects which emit light of their own are called luminous bodies, e.g., the sun, the stars, etc. Question 26. Once the tube is bent at some angle, it is not possible to see the source of light through it. Compare it with your image as you see it in a mirror. a bright ring of light enclosing the eclipsing body. All the space behind the opaque object up to some distance behind it seems to be filled with the shadow. that allows you to see things is called as light. (d) glass, Question 34. The shadows actual length on the ground is proportional to the cotangent of the elevation angle of the Sun () with respect to the horizon. (b) non-luminous lateral dispersion reflection rectilinear propagation diversion Viewed by: 0 students The shadow of a coloured object is also coloured. Question 4. the shadow of a cone appears to be a triangle on the screen. Moon is a non-luminous body though it glows. Does the length of shadow also change from season to season? Answer: Wood and bricks are the substances through which light does not pass. An image is different from a shadow. The size of shadow totally depends on distance between object Objects that do not have light of their own are called __________ objects. 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. (a) Rectilinear propagation of light The wall or ground behind the opaque object is the screen. Question and Answer forum for K12 Students. Therefore, when an object stands in the path of light, it obstructs the light rays from propagating. A shadow generally takes up most of the space behind an opaque item with light right in front of it. b. 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. 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