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NEET2026PhysicsChapterActual

Unpolarized light of initial intensity I₀ is incident on a pair of polaroids. The first polaroid acts as a polarizer and the second as an analyzer. If the intensity of the light transmitted through the analyzer is I₀ 4 , what is the angle between the transmission axes of the two polaroids?

Options

  1. A30^
  2. B45^
  3. C60^
  4. D90^

Correct answer

B. 45^

Step-by-step solution

Intensity of light after passing through the first polaroid is I₁ = I₀ 2 . Let be the angle between the transmission axes of the two polaroids. According to Malus's law, the intensity of light transmitted through the analyzer is I₂ = I₁ ^2 . Substituting the given values: I₀ 4 = I₀ 2 ^2 ^2 = 1 2 = 1 2 = 45^ Answer: 45^

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