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Wave Optics question

2025 · Q175
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Wave Optics question

2025 · Q175

NEETPhysicsWave OpticsMCQ+4 / −1

An unpolarized light beam travelling in air is incident on a medium of refractive index 1.73 at Brewster's angle. Then

  1. A
    Both reflected and transmitted light are perfectly polarized with angles of reflection and refraction close to 60∘60^{\circ}60∘ and 30∘30^{\circ}30∘, respectively
  2. B
    Transmitted light is completely polarized with angle of refraction close to 30∘30^{\circ}30∘
  3. C
    Reflected light is completely polarized and the angle of reflection is close to 60∘60^{\circ}60∘
  4. D
    Reflected light is partially polarized and the angle of reflection is close to 30∘30^{\circ}30∘
View written solutionFree

Correct answer: C

Using Brewster law

NEET 2025 Physics - Wave Optics Question 2 English Explanation

$$\begin{aligned} \& \begin{aligned} \& \mu=\tan \theta_p \\ \& \Rightarrow 1.73=\tan \theta_p \\ \& \Rightarrow \sqrt{3}=\tan \theta_p \\ \& \Rightarrow \theta_p=60^{\circ} \end{aligned}\\ \& \text { At this polarising angle, reflected light is perfectly polarized and transmitted light is partially polarised. } \end{aligned}$$

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