Question

1 point
11) A concave mirror of radius
20cm then it's focal length is *
O A) 10cm
O B) 20cm
O C) 30cm
O D) 40cm​

Answer 1

Answer:

Explanation:So, focal length = 21​× radius of curvature = 21​×20 cm = 10 cm. verified_toppr. Answer verified by Toppr.

Answer 2

Answer:

your answer is

Explanation:

The radius of curvature of a concave mirror is 20 cm? Therefore the focal lenghth of the concave mirror is 10 cm.