MHT CET 2025 Physics question
A beam of light of intensity I falls on a system of three polaroids which are arranged in succession such that the pass (transmission) axis is turned through with respect to preceding one. The fraction of the incident light intensity that passes through the system is ()
Answer: (B)
Solution
Treating the incident beam as unpolarised light, the first polaroid transmits half the intensity: . The next two polaroids each have their axis from the preceding one, so by Malus's law and $ =
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