Physics, asked by sahil2260, 1 year ago

The radius of curvature of a concave
mirror is 15 cm. Its focal length will
be
(A) -15 cm (B) -7.5 cm
(C) + 30 cm (D) +7.5 cm

Answers

Answered by sankalp222

(D) +7.5 cm

think so mate hope it helps you

charanvamsi: focal length of concave is negative

Answered by charanvamsi

r=-15cm.

f=?

r=2f

-15=2f

f=-15÷2

f=-7.5cm.(b)

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