Y THE INSIRCTORI (ohreadable work will be ignored.) UATIONS!!! ol Cacn pa kkTBE
ID: 2039896 • Letter: Y
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Y THE INSIRCTORI (ohreadable work will be ignored.) UATIONS!!! ol Cacn pa kkTBE READABLE B ASSUME SI units(s points total) INCLUDE SYMBOAIC EQUATIONSt 1. (1 pt) If the incident angle form the air is ?.ir = 30°, & the refracted angle within the glass is glass209 what is the index of refraction of the glass plate? ai gas 2. (1 pt) What is the critical angle for light coming up through the glass towards the air? Ifyou don't have an answer for #1, use n-1.744. 3. (1 pt) What is the Brewster angle for light incident upon the glass from the air? If you don't have an answer for #1, use n = 1.744.Explanation / Answer
1) theta air = 30 degrees, theta glass = 20 degrees
rrefractive index of air n1=1
from snells law
n1*sin(theta1) = n2 sin(theta2)
1*sin(30) = n2*sin(20)
n2 = 1.462
2) for critical angle, theta1 =90 degrees
n1*sin(theta1) = n2*sin(theta2)
1*sin(90) = 1.462*sin(theta2)
theta2 = 43.2 degrees
3) Brewsters angle tan(theta p) = n2/n1
theta = arctan(1.462/1)
theta = 55.6 degrees
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