Question

A vessel has a concave mirror of focal length 30 cm placed at the bottom. It is filled with water upto 20 cm. The position of the image of the sun from the surface of water is

Answer 1

Answer:

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Answer 2

Given:-

f=-20cm

μ=-33cm

By using mirror formula

$\frac{1}{v} +\frac{1}{u} =\frac{1}{f}$

$\frac{1}{v} -\frac{1}{30} =\frac{-1}{20}$

$\frac{1}{v} =\frac{1}{30} -\frac{1}{20}$

$\frac{1}{v}=\frac{1}{60}$

$v=-60$

$m=\frac{-v}{u}=-\frac{-60}{-30} =-2$

position of the image of the sun from the surface of water is virtual and inverted and of same size.