Unpolarised light is incident from air on a plane surface of a material of refractive index $$\mu$$. At a particular angle of incidence ‘i’, it is found that the reflected and refracted rays are perpendicular to each other. Which of the following options is correct for this situation ?

A

$$i= \tan^{-1} \left(\frac{1}{\mu}\right)$$

B

$$i= \sin^{-1} \left(\frac{1}{\mu}\right)$$

C

Reflected light is polarised with its electric vector perpendicular to the plane of incidence

D

Reflected light is polarised with its electric vector parallel to the plane of incidence