Question

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Question is : The radical of curvature of a spherical mirror is 20cm . what is its focal length

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Answer 1

Explanation:

Radius of curvature = 2 x focal length.

$So, \: focal \: length = \frac{1}{2} × radius \: of \: curvature$

$= > \frac{1}{2} \times 20cm = 10cm$

Answer is 10cm

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Answer 2

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