A beam of light is incident from air to water at an angle of 30(^o). Find the angle of refraction if the refractive index of water is 4/3
-
A.
15(^o) -
B.
18(^o) -
C.
22(^o) -
D.
24(^o)
Correct Answer: Option C
Explanation
X = (frac{4}{3}) r = ?
Shell’s law:. = (frac{Sin i^0}{ Sin r^0})
= (frac{Sin 30^0}{Sin r^0})
Sin(r^0) = (frac{3 Sin 30^0}{4})
Sin (r^0) = 0.375
R (^o) = Sin-1 (0.375)
R (^o) = 22.02 (^o)
R (^o) = 22 (^o)
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