Question

Brewster's law can be expressed as:

• A. $\mu = \tan r$, where $\mu$ is the refractive index and $r$ is the angle of refraction
• B. $\tan i = \frac{1}{\mu}$, where $\mu$ is the refractive index and $i$ is the polarizing angle
• C. $\cos r = \mu$, where $\mu$ is the refractive index and $r$ is the angle of refraction
• D. $\mu = \tan i$, where $\mu$ is the refractive index and $i$ is the polarizing angle

Hint:

At Brewster’s angle, the reflected beam is fully plane-polarized, and θBrewster + θrefracted = 90 degree

Answer 1

The Correct Option is D

Brewster's law states that the polarizing angle \(i_p\) satisfies
\[\tan i_p = \mu,\]
where \(\mu\) is the refractive index of the medium.