4) A light ray strikes the surface of sapphire ( n = 1.77) at an angle of incide

Question

4) A light ray strikes the surface of sapphire ( n = 1.77) at an angle of incidence of 40o. What is the angle of refraction ? 5) A ray of light enters a pane of glass with an angle of incidence of 37o. The index of refraction of the glass is 1.48. What is the angle of incidence on the far side of the pane of glass ? 4) A light ray strikes the surface of sapphire ( n = 1.77) at an angle of incidence of 40o. What is the angle of refraction ? 5) A ray of light enters a pane of glass with an angle of incidence of 37o. The index of refraction of the glass is 1.48. What is the angle of incidence on the far side of the pane of glass ?

Explanation / Answer

index of refraction of sapphire n = 1.77 angle of incidence i = 40o the angle of refraction r = ? we know sin i / sin r = n from this sin r = sin i / n = 0.363 r = 21.29 degrees 5) angle of incidence i = 37o The index of refraction of the glass n = 1.48 the angle of incidence on the far side of the pane of glass r =? we know sin i / sin r = n sin r = sin i / n = 0.4066 r = 23.99 degrees

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