CUET · PHYSICS · PYQ PAPER 2023
When the angle of incidence on a material is \(60^{\circ}\), the reflected light is completely polarised. The velocity of the refracted ray inside the material in cm/s is :
- A \(\frac{3}{\sqrt{2}} \times 10^8\)
- B 0.5 \(\times 10^8\)
- C \(\sqrt{3} \times 10^8\)
- D 3 \(\times 10^8\)
Answer & Solution
Correct Answer
(C) \(\sqrt{3} \times 10^8\)
Step-by-step Solution
Detailed explanation
\(n = \tan(i_p)\) \(n = \tan(60^{\circ}) = \sqrt{3}\) \(v = \frac{c}{n}\) \(v = \frac{3 \times 10^8 \text{ m/s}}{\sqrt{3}}\) \(v = \sqrt{3} \times 10^8\)
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