a ray of yellow light crosses the boundary between glass and air, going from glass to...

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a ray of yellow light crosses the boundary between glass andair, going from glass to air. If the angle of incidence is 30degrees, what is the angle of refraction

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4.1 Ratings (766 Votes)

Note that from Snell's law,Â Â Â Â Â Â Â Â
Â Â Â Â Â Â Â Â
n1sin(t1) = n2sin(t2)Â Â Â Â Â Â Â Â
Â Â Â Â Â Â Â Â
whereÂ Â Â Â Â Â Â Â
Â Â Â Â Â Â Â Â
n1 = index of refraction of first medium = Â Â 1.5Â Â Â Â Â
t1 = angle of incidence = Â Â 30Â Â degreesÂ Â
n2 = index of refraction of second medium = Â Â 1Â Â Â Â Â
t2 = angle of refraction
Â Â Â Â Â Â Â Â
Thus,Â Â Â Â Â Â Â Â
Â Â Â Â Â Â Â Â
t2 = Â Â 48.59Â Â Â degreesÂ Â [ANSWER]

I used the index of refraction of glass as 1.50. In case you use a different value, please use that one.

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