$A$ beam of light strikes a piece of glass at an angle of incidence of $60^{\circ}$ and the reflected beam is completely plane-polarized. The refractive index of glass is

The Brewster's angle $i_b$ for an interface should be

The critical angle of a certain medium is $\sin^{-1}\left(\frac{3}{5}\right)$. The polarizing angle of the medium is

If the polarizing angle for a medium is $60^\circ$,then the critical angle for that medium is . . . . . .

When an unpolarised light beam is incident from air onto glass $(n = 1.5)$ at the polarising angle:

$A$ parallel beam of monochromatic unpolarised light is incident on a transparent dielectric plate of refractive index $\mu = \sqrt{3}$. The reflected beam is completely polarised. Then the angle of incidence is....$^o$