Q169 / 180 · COMEDK 2017 · Physics

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

  • Correct answer
    A
    reflected beam is polarised 100 percent
  • B
    reflected and refracted beams are partially polarised
  • C
    the reason for (a) is that almost all the light is reflected
  • D
    All of the above

Solution

According to phenomena of polarisation by reflection, when unpolarised light beam is incident from air onto glass $(n=1.5)$ at the polarising angle (Brewster's angle), then reflected beam is polarised completely i.e. $100 \%$.

Hence, the correct answer is option: 'A'.

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