A fish in water sees an object 24 cm above the surface of water. The height of object above the surface of water that will appear to fish is

8 cm

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18 cm

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24 cm

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32 cm

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Solution

The correct option is D 32 cm
Let, the height of the object above surface be h.

Then, the height seen by fish= $h \frac{μ_{2}}{μ_{1}}$
where, $μ_{1}$ =medium in which fish is
and $μ_{2}$ =medium in which object is

Hence, $24 = h \frac{1}{4 / 3}$

$⟹ h = 24 \times \frac{4}{3} = 32 c m$

Answer-(D).

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A fish in water sees an object 24 cm above the surface of water. The height of object above the surface of water that will appear to fish is

The correct option is D 32 cmLet, the height of the object above surface be h.Then, the height seen by fish=hμ2μ1 where, μ1=medium in which fish is and μ2=medium in which object isHence, 24=h14/3⟹h=24×43=32cmAnswer-(D).