A concave mirror produces three times …
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Gaurav Seth 5 years, 2 months ago
(a) 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
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