If the velocity of light in a medium is 2×10⁸ m/s, what will be the refractive index of that medium?
WB Madhyamik 2018
Ans.
The velocity of light in a medium = 2is × 10⁸ m/s and the velocity of light in a vacuum is 3 × 10⁸ m/s. Is. Therefore
the grade of that medium = velocity of light in vacuum/velocity of light in a medium
= 3×10/2×10 =3×5/2×5 = 3/2 = 1.5 Ans.
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