A ray of light passes from one medium to another medium. Refraction takes place when angle of incidence is

(a)

0^o

(b)

45^o

(c)

90^o

(d)

120^o

When the reflecting surface is curved outwards the mirror formed will be

(a)

concave mirror

(b)

convex mirror

(c)

plane mirror

(d)

spherical mirror

The focal length of a concave mirror is 5cm. Its radius of curvature is

(a)

5 cm

(b)

10 cm

(c)

2.5 cm

When a beam of white light passes through a prism it gets

(a)

Reflected

(b)

deviated and dispersed

(c)

only deviated

(d)

refracted

A real and enlarged image can be obtained by using a

(a)

convex mirror

(b)

plane mirror

(c)

concave mirror