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The image (of a real object) formed by a...

The image (of a real object) formed by a concave mirror is twice the size of the object. The focal length of the mirror is 20cm. The distance of the object from the mirror is:

A

20 cm

B

30 cm

C

25 cm

D

15 cm

Text Solution

Verified by Experts

The correct Answer is:
B
In this case |V|=2|u|
by applying mirror formula u=-10, -30
so The distance of the object from the mirror is (are) 10,30 cm
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