CUET · PHYSICS · PYQ PAPER 2023
Which of the following option shows the Brewster's law in polarisation of light ?
- A \( \mu \sin i_B = 1 \)
- B \( \mu \cos i_B = 1 \)
- C \( \mu \cot i_B = 1 \)
- D \( \mu \tan i_B = 1 \)
Answer & Solution
Correct Answer
(C) \( \mu \cot i_B = 1 \)
Step-by-step Solution
Detailed explanation
Brewster's Law states that \(\mu = \operatorname { t a n } i _{ B }\). By substituting \(\tan i _{ B }\) with \(/ \cot i_{B^{\prime}}\), the equation becomes \(\mu=1 / \cot i_{B^{\prime}}\), which simplifies to \(\cot i_B=1\). \( \mu \cot i_B = 1 \)
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