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प्रश्न
The velocity of light in air is \(3 \times 10^{8} \mathrm{~ms}^{-1}\) and in glass is \(2 \times 10^{8} \mathrm{~ms}^{-1}\). Find the refractive index of glass.
संख्यात्मक
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उत्तर
\[ \text{Refractive index of glass} = \frac{\text{Speed of light in air}}{\text{Speed of light in glass}} \]
\[= \frac{3 \times 10^{8}}{2 \times 10^{8}}\]
= 1.5
Therefore, the refractive index of glass is 1.5. Refractive index has no unit.
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