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29 Nov 2021
Given information
distance between polarizing sheets = 2 cm
The transmission axis of the second sheet is 30° relative to the first one.
The transmission axis of the third sheet is 90° relative to the first one
Step-by-step explanation
Step 1.
According to Malus law, the transmitted light intensity through polarizer is given as
Here \theta is angle with principal axes
The expression for the transmitted light intensity through first polarizer is given as
Since average value of 
Therefore,
The expression for the transmitted light intensity through second polarizer is given as
………..(2)
Substitute value of 
in equation (2)
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Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922
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