LIGHT MCQs

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1. . The velocity of light is:





2. . Light waves are:





3. . Corpuscular theory of light was propounded by:





4. . Wave theory of light was proposed by:





5. . The turning back of a part of light from the boundary of a medium is called:





6. . The bending of light when it enters from one medium to the other is called:





7. . The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant for all angles of incidence. This law is known as:





8. . The relationship between focal length ‘f’ and radius of curvature ‘r’ of a spherical mirror is:





9. . If an object is placed at C of the concave mirror, then the image formed will be:





10. . If an object is placed within the focal length of a concave mirror then the image formed will be:





11. . The radius of curvature of a concave mirror is 40 cm, its focal length will be equal to:





12. . The unit for the power of lens is:





13. . The focal length of a lens is 20 cm; its power in dioptre will be equal to:





14. . If an object is placed in front of a convex lens in between its F and 2F then the image will be:





15. . The least distance of distinct vision is:





16. . A convex lens of short focal length is used as:





17. . Magnifying power ‘M’ of a simple microscope is equal to:





18. . The phenomenon of bending of incident light towards the geometrical shadow of a sharp wedge is called:





19. . To measure the height of distant objects we use:





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