At what angle is the sun above the horizon if its light is found to be completely polarized when it is reflected from the top surface of a slab of glass (n = 1.65)?
A)31.2 $\degree$
B)44.4 $\degree$
C)58.8 $\degree$
D)66.6 $\degree$

Question

Quizplus · Accepted Answer

The correct answer is A.The angle of incidence is equal to the angle of reflection. The angle of polarization is equal to the angle of incidence. Therefore, the angle of the sun above the horizon is equal to the angle of polarization. The angle of polarization is given by the Brewster's angle, which is given by:$$	heta_p = \arctan(\frac{n_2}{n_1})$$where $n_1$ is the index of refraction of the first medium (air) and $n_2$ is the index of refraction of the second medium (glass).Substituting the given values, we get:$$	heta_p = \arctan(\frac{1.65}{1}) = 31.2^\circ$$

At What Angle Is the Sun Above the Horizon If °\degree°

At What Angle Is the Sun Above the Horizon If $\degree$