Practice Sheets on Light Reflection & Refraction

Light reflection and refraction Worksheet-1

1. Fine the focal length of a convex mirror of radius of curvature 1 m.

A. 0.5 m                                          B. 1 m

C. 0.25 m                                       D. None of these

2. An object 4 cm in size is placed at a distance of 25.0 cm from a concave mirror of focal length 15.0 cm. find the position nature and height of the image.

A. –37.5 cm, real and inverted, –6 cm

B. –37.5 cm, virtual and inverted, –1.5 cm

Light reflection and refraction Worksheet-2

1. Light travels through water with s speed of 2.25 × 10⁸ m/s. what is the refractive index of water? Given speed of light in vacuum = 3 × 10⁸ m/s.

A. 1.33                B. 0.75                C. 0.707             D. 1.5

Light reflection and refraction Worksheet-3

1. To form a real image, the mirror required is

A. Convex                                       B. concave

C. Convex or concave                  D. cannot say

2. I. A real image is always inverted.

II. A virtual image is always erect.

A. Only I is true                            B. Only II is true