The refractive index of diamond is 2. The velocity of light (in cm/sec) in diamond will be:

6 \times 10^{10}

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2 \times 10^{13}

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1.5 \times 10^{10}

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3 \times 10^{10}

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Solution

The correct option is C $1.5 \times 10^{10}$
Velocity of light in vacuum = $3 \times 10^{10} c m / s e c$
Velocity in diamond = $Velocity in vacuum/refractive index of diamond$

=> Velocity of light in diamond = $\frac{3 \times 10^{10}}{2}$ = $1.5 \times 10^{10} c m / s e c$

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