Question

What is Brewster's angle for air to glass transition? (Refractive index of glass 1.43)

• A. ${30}^{\circ }$
• B. ${40}^{\circ }$
• C. ${55}^{\circ }$
• D. ${25}^{\circ }$

Answer 1

The correct option is C ${55}^{\circ }$

According to Brewster’s law, Brewster’s angle is given by
$\tan \theta =\mu$
$\tan \theta =\frac{1.43}{1.0}$
$\theta ={\tan }^{-1}\left(1.43\right)={55}^{\circ }$