The spherical mirror with a reflecting surface curved inward is called

(a)

convex mirror

(b)

concave mirror

(c)

curved mirror

(d)

None of the above

The spherical mirror used as a rear view mirror in the vehicle is

(a)

concave mirror

(b)

convex mirror

(c)

plane mirror

(d)

None of the above

The distance from the pole to the focus is called

(a)

Pole length

(b)

focal length

(c)

principal axis

(d)

None of the above

If the focal length of a spherical mirror is 10 cm, what is the value of its radius of curvature?

(a)

10 cm

(b)

5 cm

(c)

20 cm

(d)

15 cm

The refractive index of water is

(a)

1.0

(b)

1.33

(c)

1.44

(d)

1.52