Light passes from air to glass and is deviated 3.$5^\circ$. When the angle of incidence is $10^\circ$, the refractive index of the material of the glass is ______.

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Light passes from air to glass and is deviated 3.$5^\circ$. When the angle of incidence is $10^\circ$, the refractive index of the material of the glass is 1.54. Explanation: Deviation, δ = 3.$5^\circ$ Angle of incidence, i = $10^\circ$ Refraction angle (r) = i − δ = $10^\circ$ − 3.$5^\circ$ = 6.$5^\circ$ Using Snell’s law: n = sin i/sin r = (sin $10^\circ$)/(sin 6.$5^\circ$) = 0.$\frac{1736}{0}$.1132 = 1.534 ≈ 1.54 (nearest option)

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