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A glass window (n = 1.52) has a uniform layer of ice on it (n = 1.31). What is the critical angle for a ray trying to pass from glass to ice? (Water n = 1.33, Air n = 1.00) (Unit = deg) HELP PLSS!!
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42 votes
42 votes
A glass window (n = 1.52) has a

uniform layer of ice on it (n = 1.31).
What is the critical angle for a ray
trying to pass from glass to ice?
(Water n = 1.33, Air n = 1.00)
(Unit = deg)
HELP PLSS!!

User Akira Yamamoto
by
2.4k points

1 Answer

22 votes
22 votes

Answer: 59.5 deg

Explanation: In this problem, we are giving 1.31 as n2 and 1.52 as n1. Using the formula of critical angle= arcsine(n2/n1) we get the equation critical angle=arcsine(1.31/1.52) from there, you divide 1.31 by 1.52, and get 0.862.

On your calculator you then should press 2nd and then the sine button to get sine^-1 (arcsine) and in the parenthesis after arcsine put in 0.862, the answer you get will be 59.5.

User Dizzwave
by
2.2k points
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