The Critical Angle

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This week’s lab is based on our knowledge of Snell’s Law:

n1 sin mathml equation1 = n2 sin mathml equation2

and subsequently the critical angle:

sin mathml equationc = nr/ni

Imagine light traveling in these three situations:

Water to air (nwater = 1.33)

Glass to Air (nglass = 1.49)


Glass to Water.


Please make a plot of angle of refraction versus incident angle for each of these and please point out where the critical angle is.

Make sure you use the lab report format (see attachment) and see Lab 5 Notes for any changes to this lab and answer sheet.

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