Question

Devise a method to find the focal length of a concave mirror.​

Answer 1

Answer:

Use the formula

$\frac{1}{f} = \frac{1}{v} + \frac{1}{u}$

And find the focal length.

Answer 2

Answer:

Focal Length - The distance between the pole P of the concave mirror and the focus F is the focal length of the concave mirror. Thus, the focal length of a concave mirror can be estimated by obtaining a 'Real image' of a distant object at its focus, as shown in the figure.

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