Question

A point object is placed at a distance of 30 cm from a convex mirror of focal length 30 cm. The
image will be formed at
(1) Pole
(2) Infinity
(3) 15 cm behind the mirror
(4) 15 cm in front of the mirror
​

Answer 1

Answer:

U=30 cm (negative)

f=30 cm

V=?

1/f=1/u + 1/v

1/30=-1/30 + 1/v

1/v=1/30+1/30=2/30

V=30/2=15 cm

Behind the mirror.

Answer 2

Answer:

15 cm behind the mirror

Explanation:

apply 1/f=1/v+1/u

whereu=-30 cm  and f=30cm and find v