Question

Formula to calculate focal length of a concave mirror

Answer 1

Heya Frnd.........

To find the focal length of any kind of spherical mirror, we require two measurements

♪ v = distance of image from the mirror

♪ u = distance of object from mirror.

Then we apply mirror formula :-

$\frac{1}{v} - \: \frac{1}{u} \: = \: \frac{1}{f}$

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