Question

where should an object be placed in front of a concave mirror of focal length 15cm so as to obtain real image three times magnified?​

Answer 1

Answer:

v = 60

Explanation:

M = v/u = 3 therefore v = 3u

use The Formula

1/u + 1/3u = 1/15

4/3u = 1/15  

3u/4 = 15

Giving u=20 & v=60

Answer 2

Explanation:

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