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प्रश्न
The refractive index of a material is 1.33. If the velocity of light in vacuum is 3 × 108 ms−1, find the velocity of light in the material.
संख्यात्मक
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उत्तर
\[ \mu = \frac{\text{Velocity of light in vacuum}}{\text{Velocity of light in the material}} \]
\[ \therefore \ 1.33 = \frac{3 \times 10^{8} \ \mathrm{ms^{-1}}}{\text{Velocity of light in the material}} \]
\[ \therefore \ \text{Velocity of light in the material} = \frac{3 \times 10^{8}}{1.33} \]
\[ = 2.25 \times 10^{8} \ \mathrm{ms^{-1}} \]
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