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(b) An object is placed at a distance of 10 cm infornt of a convex mirror. The image is formed at 5 cm behind the mirror. Find the focal length of the convex mirror. |
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Answer» y step :- Since it is a convex MIRROR, therefore U= -ve and since the image is formed behind the mirror, therefore v = +ve. The FORMULA for mirror is- 1/v + 1/u = 1/f = 1/f = 1/5 + 1/-10 = 1/f = 1/5 - 1/10 = 1/f = 2–1/10 = 1/f = 1/10 f = 10cm Therefore, the focal length of the convex mirror is 10 cmI hope it's HELP you |
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