Question

a parallel beam of light is made to fall on a concave mirror. an image is formed at a distance of 7.5cm from the mirrir what are the focal length and tge radius of curvature of the mirror​

Answer 1

Answer:

When ray of light parallel to principal axis and fall on mirror the image will formed on the focal length and vice versa.

so,

V = f = 7.5 cm

and

Radius of Curvature = 2* Focal length

ROC = 2* 7.5 = 15 cm

hence the required answer is 15 cm.

Explanation:

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