First slide

Refraction of light

Question

The index of refraction of diamond is 2.0, velocity of light in diamond in cm/second is approximately

Moderate

A

$6 \times 10^{10}$
B

$3 .0 \times 10^{10}$
C

$2 \times 10^{10}$
D

$1 .5 \times 10^{10}$

Solution

$v = \frac{c}{μ} = \frac{3 \times 10^{8}}{2} = 1 .5 \times 10^{8} m / s = 1 .5 \times 10^{10} cm / s$

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