Question bank/JEE Main/Physics
JEE MainPhysics
Three polaroids are kept coaxially. Angle between the first and
third polaroid is 90°. Angle between the first and second polaroid is
60°. If unpolarized light energy incident on the first polaroid is I0.
Light energy that emerges from the system is
Show answer and solution
According to Malus law, I = I0 cos2 θ
After 2nd Polaroid, I = [IMAGE] cos2 60° =
[IMAGE] After 3rd Polaroid, I = [IMAGE] cos2 30° =
After 2nd Polaroid, I = [IMAGE] cos2 60° =
[IMAGE] After 3rd Polaroid, I = [IMAGE] cos2 30° =
Source: Grass-G / P-01 Physics Paper-01_Update.docx
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