Ncert- class6- science- Chapter 8: Light, Shadows and Reflections 2 Welcome to your Ncert- class6- science- Chapter 8: Light, Shadows and Reflections 2 1. ________ materials do not allow any light to pass through. Transparent Opaque Translucent Semi absorbent None 2. Match the following: ItemTransparency(a) Iron door(i) Transparent(b) Glass window pane(ii) Translucent(c) Butter paper(iii) Opaque (a) - (iii), (b) - (ii), (c) - (i) (a) - (ii), (b) - (i), (b) - (iii) (a) - (i), (b) - (ii), (c) - (iii) (a) - (iii), (b) - (i), (c) - (ii) None 3. The phenomenon by which the incident light falling on a surface is sent back into the same medium is known as ___________. Refraction Dispersion Reflection None None 4. Translucent materials allow ______ amount of light to pass through. some no very less entire None 5. When light is reflected from the a spherical or curved surface: the laws of reflections are followed the laws of reflections are not followed None 6. Select the odd one out (shadows, eclipses, expansion, images) eclipses expansion shadows images None 7. Using a light lamp, short and clear shadow of a hand can be obtained by placing the hand None of these as far from the lamp as is possible on the light lamp so as not to allow the light to pass nearer to the light lamp None 8. What is the role of aperture in pinhole camera ? Sharpens the image Allows light to enter to form the image Diffracts light passing through it None of these None 9. Which of the following statements is true? Light does not change its direction on reflection. The image formed by a pinhole camera is inverted because light travels in a straight line Reflection is possible only from polished surface. As we move the object away from the light source, the shadow of the object becomes smaller. None 10. Which of the following objects is not translucent in nature? Butter paper Glass pane Frosted glass Plastic ruler None 11. Which of the following is NOT true about an image formed by a plane mirror? The image is of the same colour as the object. The image is of the same size as the object. The image is formed on the other side of the mirror The image depicts only the shape of the object. None 12. The term reflection refers to the bending of light rays: when they enter a different medium around the boundary of a narrow aperture around a sharp edge when they strike a mirror None 13. On which of the following factors does the shape and size of a shadow depend? Direction and shape of the source of light Size and position of the source of light Shape and distance of the source of light Shape and size of the source of light None 14. Shadow moves with All of the above The change in the distance between the object and the source of light The change in position of the source of light The change in position of the object None 15. The bouncing of a beam of light from a polished surface in some other direction is called - scattering reflection refraction dispersion None 16. An example for a non-luminous object is ___________. a candle the sun a well polished gas burner a 100 W electric bulb None 17. Which of the following is an example of natural pinhole camera ? Holes in a leaf Thorns on a stem All the above Pollen grains in flower None 18. Pinhole camera is a simple application of : refraction of light rectilinear propagation of light reflection of light scattering of light None 19. Which of the following is not a characteristic of pinhole camera ? It works on the principle of rectilinear motion of light It is inexpensive to make It produces an inverted image The image produced is black and white None 20. What kind of lens is used in making a pinhole camera ? Concavo-convex lens Convex lens No lens is used Concave lens None 21. Sometimes when we pass under a tree covered with a large number of leaves during the daytime, we notice small patches of sunlight under it. Which of the following devices works on the same principle as is observed in the above given scenario? A pinhole camera A luminous object A glass window A mirror None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
