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A concave mirror of focal length 15 cm i...

A concave mirror of focal length 15 cm is placed in water of refrective index `mu=4//3`. Water is filled upto 30 cm. An object of height 1 cm is paced at a distance of 20 cm in front of the mirror. If the size of image is n times size of object then n=

A

3

B

2

C

2.5

D

5

Text Solution

Verified by Experts

The correct Answer is:
A
Inside water
`u=-20cm`
`f=-15cm`
`impliesv=-60cm`
`m=(-v)/(u)=-3`
`impliesn=3`
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