the distance between a pencil and its image formed by a concave mirror is 30 cm . if the linear magnitude produced is 1/5 . find the focal length of the mirror
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Your answer is given below:
Explanation:
Given,
Object distance , u = + 30 cm and image distance v = + 30 cm
If f be the focal length, 1/f = 1/u + 1/v = 1/30 + 1/30 = 1/15 or f = 15 cm
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