First slide

Ray optics

Question

If the refractive index of diamond is 2.4 find the velocity of light in diamond. (c = 3×10⁸m/s)

Moderate

A

1.25 × 10⁸ m/s
B

2.25 × 10⁸ m/s
C

1.5 × 10⁸ m/s
D

4.25 × 10⁸ m/s

Solution

$V_{d} = \frac{V_{air}}{μ_{d}} V_{d} = \frac{3 x 10^{8}}{2.4} = 1.25 x 10^{8} {ms}^{- 1}$

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