physics help asap pls double check answer?

2017-03-28 12:22 am
13)
Calculate the angle of refraction of 30.0° light shines from water into ice. The indices of refraction for water and ice are 1.36 and 1.31, respectively.

1. 19.8°
2. 31.3°
3. 40.9°
4. 64.0°

my answer is 31.3 degrees but i am not sure

回答 (1)

2017-03-28 12:31 am
13)
By sin(i)/sin(r) = n(r)/n(i)
sin(30.0°)/sin(r) = 1.31/1.36
sin(r) = sin(30.0°) × (13.6/13.1)
r = arcsin[sin(30.0°) × (13.6/13.1)]
Angle of refraction, r = 31.3°

The answer: 2. 31.3°


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