Question

.
..
If the radius of curvature of a concave mirror is
30 cm. Then its focal length will be
(A) 15 cm
(B) 30 cm
(C) 60 cm
(D) 90 cm​

Answer 1

Answer:

15 cm

Explanation:

f=R/2

f=30/2

f=15

Answer 2

Answer:

Explanation:15 cm