Question

An unpolarised light is incident on a plate of refractive index $\sqrt{3}$ and the reflected light is found to be completely plane polarized. The angles of incidence and refraction are respectively

• A. ${60}^{\circ },{30}^{\circ }$
  
• B. ${30}^{\circ },{60}^{\circ }$
  
  
• C. $si{n}^{-1}\left(\frac{1}{\sqrt{3}}\right),{45}^{\circ }$
  
  
• D. $ta{n}^{-1}\left(\frac{\sqrt{3}}{2}\right),{30}^{\circ }$

Answer 1

The correct option is A ${60}^{\circ },{30}^{\circ }$


$tan{i}_p=\mu =\sqrt{3}$
$i_p={60}^{\circ }$
$180=i_p+90+r$
$r=180–150={30}^{\circ }$