if you have angle of incidence was 10.20 degree ;find the refractive indix
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Explanation:
Let the refractive index of the medium be n and speed of light in air is c.
Using Snell's law of refraction : nair×sini=nmedium×sinr where nair=1
∴ 1×sini=n×sinr ⟹n=sinrsini
Velocity of light in a medium v=nc=sinic×sinr ⟹v∝sin r
Thus velocity of light is minimum in medium A.
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