Question

A 2 cm candle is placed in front of convex mirror having focal length of 15 cm . Image is formed 10 cm away from the mirror . Find object distance ?
a) 6 cm
b) -30 cm
c) 30 cm
d) 6 cm
With explanation​

Answer 1

Answer:

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Answer 2

Answer:

b) -30cm

Explanation:

1/f=1/u+1/v

1/15 = 1/10+1/u