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Question

Refractive indices of four media P, Q, R, S are $$1.33, 1.44, 1.52, 1.65$$ respectively. In which of these media is the speed of light maximum?


A
P
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B
Q
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C
R
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D
S
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Solution

The correct option is A P
Speed of light ,$$v=\dfrac{c}{\mu}$$  

                   where $$c$$=speed of light in vacuum
                      and  $$\mu$$ = refractive index of medium

Hence, for maximum speed, $$\mu$$ should be minimum.

Hence, speed of light will be maximum in P having minimum $$\mu$$.

Answer-(A).

Physics

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