MHT CET · Physics · Wave Optics
Light is incident at an angle \(i\) on a glass slab. The reflected ray is completely polarised. The angle of refraction is
- A \(90^{\circ}-i\)
- B \(180^{\circ}-i\)
- C \(90^{\circ}+i\)
- D \(\bar{i}\)
Answer & Solution
Correct Answer
(A) \(90^{\circ}-i\)
Step-by-step Solution
Detailed explanation
Brewster discovered that when a beam of unpolarised light is reflected from a transparent medium (refractive index \(=\mu)\), the reflected light is completely plane polarised at a certain angle of incidence (called the angle of polarisation \(i\) )
From figure it is clear that \(i+r=90^{\circ}\)
\(
r=(90-i)
\)
From figure it is clear that \(i+r=90^{\circ}\)
\(
r=(90-i)
\)
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