Which of the following option shows the Brewster's law in polarisation of light?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → $\mu \cot i_B=1$
Brewster's law states that the reflected light is completely polarised when the angle of incidence $(i_{B})$ satisfies the relationship-
$\tan i_{B}=μ$
$⇒\frac{μ}{\tan i_{B}}=μ1$
$⇒\mu \cot i_B=1$