home > q&a board > physics > topic: light refraction, help please! will rate!!

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posted by  Valp on 5/20/2008 2:05:49 PM  |  status: Live  

light refraction, help please! will rate!!

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The angle of refraction of a ray of light traveling through a piece of flint glass is 24°. Find the angle of incidence.
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posted by Pradeep on 5/20/2008 2:24:48 PM  |  status: Live
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Valp's comment:
"i tried that already, no luck. thanks tho"
Response Details:
Let light is traveling  from Air to glass

refractive index of flint glass ,μ'= 1.6
refractive index of air,μ = 1

given:
angle of refraction = 24 degree

By Snell's Law
Sin(i) / Sinn(r)  = μ'/μ
=> Sin(i) / Sin24 = 1.6
=> Sin(i) = 1.6*Sin24  = 1.6*0.407 =0.6512
=> i = Sin-1 (0.6512) = 40.63200 

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