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