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

Options

A. (a) Reflected beam is polarised 100 percent
B. (b) Reflected and refracted beams are partially polarised
C. (c) The reason for (a) is that almost all the light is reflected
D. (d) All of the above

Answer

A

Explanation

According to Brewster's law, when a beam of ordinary light (i.e., unpolarised) is reflected from a transparent medium (like glass), the reflected light is completely plane polarised at certain angle of incidence called the angle of polarisation.