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An incident ray in air (n=1.0) is approaching the boundary with glass (n=1.52) at an angle of incidence of 31.7 degrees. Calculate the angle of refraction.

Guest May 20, 2017
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"An incident ray in air (n=1.0) is approaching the boundary with glass (n=1.52) at an angle of incidence of 31.7 degrees. Calculate the angle of refraction."

 

Use Snell's law:   sin(i)/sin(r) = nglass/nair           where i is angle of incidence and r is angle of refraction.

 

.sin(31.7°)/sin(r) = 1.52

 

sin(r) = sin(31.7°)/1.52

 

r = sin-1(sin(31.7°)/1.52)

 

r ≈ 20.2°

.

Alan  May 20, 2017

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