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A concave mirror produces three times …

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A concave mirror produces three times enlarged real image of an object placed 10cm infront of it. Calculate the radius of the curvature of the mirror.

Posted by Preety Th 5 years, 5 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 5 months ago

The image formed in front of the concave mirror is real, so m is negative,

m = -3, u = -10 cm

As m = -v/u or -3 = -v/-10

v = -30 cm

By mirror formula,

1/f = 1/v + 1/u = 1/-30 + 1/-10 = -4/30

or f = -30/4 = -7.5 cm

Radius of curvature, R = 2f = 2 x (-7.5) = 15cm

3Thank You

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CBSE > Class 10 > Science