NEET · Physics · STD 12 - 10. Wave optics
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 Reflected light is polarised with its electric vector parallel to the plane of incidence
- B Reflected light is polarised with its electric vector perpendicular to the plane of incidence
- C \(i = ta{n^{ - 1}}\left( {\frac{1}{\mu }} \right)\)
- D \(i = si{n^{ - 1}}\left( {\frac{1}{\mu }} \right)\)
Answer & Solution
Correct Answer
(B) Reflected light is polarised with its electric vector perpendicular to the plane of incidence
Step-by-step Solution
Detailed explanation
When reflected light and refracted light are perpendicular, reflected light is polarised with electric field vector perpendicular to the plane of incidence. Also, \(tan\,\,i=\,\,\mu \) (Brewster angle)
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