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प्रश्न
The speed of light in diamonds is 125,000 km s-1. What is its refractive index? (speed of light in air = 3 × 108 ms-1).
उत्तर
Given,
Speed of light in diamond, v = 125 × 106 m/s
Speed of light in air, c = 3 × 108 m/s
Refractive index of diamond, μ D = ?
We know that,
∴ `mu = c/v`
∴ µ =`(3xx10^8m//s)/(125xx10^6m//s)`
∴ µ =`(3xx10^2m//s)/125`
∴ µ = `300/125`
∴ µ = 2.4
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