The limiting angle of total reflection for alcohol is 47 degrees. Find the refractive index of alcohol.
| December 7, 2020 | education
Refractive index of alcohol according to Snell’s law (the law of refraction of light):
sin A is the sine of the angle in the air, because the angle is limiting, then A = 90 degrees, and sine = 1
sin 47 – sine of an angle of 47 degrees in alcohol
n is the refractive index of alcohol
SinA / Sin47 = n
n = 1 / 0.73 = 1.367 = 1.37
Answer: n = 1.37
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