Question

A concave shaving mirror has a radius of curvature of 35.0 cm. It is positioned so that the (upright) image of man's face is 2.50 times the size of the face. How far is the mirror from the face ?

Answer 1

Answer:

10.5 is correct answer

Explanation:

Mark the answer b

$\frac{1}{f} = \frac{1}{v} + \frac{1}{u} \\ m = - \frac{v}{u } \\ f = - 17.5 \\ v = - 2.5u \\ by \: putting \: value \: weget \: u = 10.5$

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Answer 2

Answer:

80 cm

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Explanation: