Practice Sheets on Light Reflection & Refraction

Light reflection and refraction Worksheet-25

31. If ƒ is focal length and R is radius of curvature of a spherical mirror, then

A. R = ƒ              B. R = 2ƒ           C. R = 3ƒ           D. R = 4ƒ

32. The image formed by a concave mirror is real, inverted and of same size as that of the object. The position of the object is

A. at centre of curvature

B. at focal point

C. between centre of curvature and focal point

D. beyond centre of curvature

Light reflection and refraction Worksheet-26

41. The refractive index of diamond is

A. 1.5                   B. 1.33                C. 2.42               D. 1.8

42. Light travels fastest in

A. vacuum         B. air                   C. glass               D. diamond

43. When a ray of light travels from water to glass, it bends

A. towards normal

Light reflection and refraction Worksheet-27

51. To produce an image by a convex lens, in the position shown (see figure) the object has to be placed

A. Between Y and O                     B. At Y

C. Between X and Y                     D. At X

52. Light rays P and Q fall on optical component X and come out as R and S.

The optical component is a :