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Refractive Index

If c is the v...

Question

If c is the velocity of light in free space, the time taken by light to travel a distance $x$ in medium of refractive index $μ$ is given by :

μ x c

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\frac{μ x}{c}

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\frac{μ c}{x}

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\frac{x}{μ c}

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Solution

The correct option is B $\frac{μ x}{c}$
Time taken $=distancespeedinfreespace/refractiveindex$
$= \frac{x}{c / μ}$
$= \frac{x μ}{c}$

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