A ray of tight is incident on the surface of a glass plate' at an angle of incidence equal to Brewster's angle $\varphi$ If $\mu$ represents the refractive index of glass with respect to air, then the angle between reflected and refracted rays is

• A

  ${90}^{\circ }+\mathrm{\varphi }$

• B

  ${\sin }^{-1}(\mathrm{\mu cos}\mathrm{\varphi })$

• C

  ${90}^{\circ }$

• D

  ${90}^{\circ }-{\sin }^{-1}(\sin \mathrm{\varphi }/\mathrm{\mu })$