 Physics
8 April, 09:55

# What will the angle of refraction be for a ray of light passing from air into a sodium chloride crystal if the angle of incidence is 60.0°? The index of refraction of sodium chloride is 1.53.A. 13°B. 22°C. 34°D. 42°E. 48°

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Answers (2)
1. 8 April, 11:25
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Using Snell's Law:

n1 * sin (theta1) = n2 * sin (theta2)

where

n1 is the refractive index of the incident light (n1 = 1 in this case)

theta1 is the angle of incidence

n2 is the refractive index of the material that the light is entering (n2 = 1.53 in this case)

theta2 is the angle of refraction

n1 * sin (theta1) = n2 * sin (theta2)

becomes

1 * sin (60) = 1.53 * sin (theta2)

or

1 * 0.866 = 1.53 * sin (theta2)

0.866 = 1.53 * sin (theta2)

sin (theta2) = 0.866 / 1.53 = 0.566

theta2 = arcsin (0.566) = 34 degrees (the angle of refraction)
2. 8 April, 11:52
0
It should be 34 degrees because i took the test

Explanation:

Took the test
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