Light travels from plastic (n=2.0) to an unknown substance, and total internal reflection occurs at 60...
Light travels from plastic (n=2.0) to an unknown substance, and total internal reflection occurs at 60 degrees from the normal. What is the index of refraction of the second substance? Keep 2 digits after decimal point. Your answer should be formatted like: 0.00
Homework Answers
for incident angle equal to critical angle.
i = 60 deg
refraction angle, r = 90 deg
Applying snell's law,
ni sin(i) = nr sin(r)
2 sin(60) = n sin90
n = 1.73
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