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Standard XIII

Physics

Apparent Depth

Consider the ...

Question

Consider the situation shown in figure. Water $(μ_{w} = \frac{4}{3})$ is filled in a breaker upto a height of 10 cm. A plane mirror fixed at a height of 5 cm from the surface of water. Distance of image from the mirror after reflection from it of an object O at the bottom of the beaker is

15 cm

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12.5 cm

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7.5 cm

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10 cm

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Solution

The correct option is B 12.5 cm
From figure it is clear that object appears to be raised by $\frac{10}{4} c m (2.5 c m)$
Hence distance between mirror and O'=5+7.5 =12.5 cm
So final image will be formed at 12.5 cm behind the plane mirror.

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Consider the situation shown in figure. Water (μw=43) is filled in a breaker upto a height of 10 cm. A plane mirror fixed at a height of 5 cm from the surface of water. Distance of image from the mirror after reflection from it of an object O at the bottom of the beaker is

The correct option is B 12.5 cmFrom figure it is clear that object appears to be raised by 104cm(2.5cm) Hence distance between mirror and O'=5+7.5 =12.5 cm So final image will be formed at 12.5 cm behind the plane mirror.

Consider the situation shown in figure. Water $(μ_{w} = \frac{4}{3})$ is filled in a breaker upto a height of 10 cm. A plane mirror fixed at a height of 5 cm from the surface of water. Distance of image from the mirror after reflection from it of an object O at the bottom of the beaker is

The correct option is B 12.5 cm
From figure it is clear that object appears to be raised by $\frac{10}{4} c m (2.5 c m)$
Hence distance between mirror and O'=5+7.5 =12.5 cm
So final image will be formed at 12.5 cm behind the plane mirror.