The refractive index of the material of the prism is √3

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The refractive index of the material of the prism is √3 ; then the angle of minimum deviation of the prism is

1. 30°
2. 45°
3. 60°
4. 75°

Correct Option: C

Angle of minimum deviation

μ =	sin		A + δ_m			⇒ √3 =	sin		A + δ_m
			2						2

	sin		A				sin		60°

			2						2

⇒ sin		30° +	δ_m		=	√3	⇒ 30 °	δ_m	= 60°
			2			2		2

⇒ δ_m = 60°.