Chinese, asked by ashasnchoudhary, 1 month ago

6. The radius of curvature of a concave mirror
is 40 cm. Its focal length is
a) 20 cm
b) 40 cm
c) 60 cm
d) 80 cm

Answers

Answered by 23418

1

Answer:

Explanation:

The distance from the pole to the center of curvature is called the radius of curvature(r). The distance from the pole to the focal point is called the focal length (f). The focal length of a spherical mirror is approximately half its radius of curvature.

A]So, focal length(f) = (radius of curvature(r))/2

f = 40/2 cms

f = 20 cm

Answered by amyjaitley

1

A) 20 cm is the correct answer.

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