Download Chapter 29 Problem 27 † Given θ = 70 Solution Find the fraction of

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Transcript
Chapter 29
Problem 27
†
Given
θ = 70◦
Solution
Find the fraction of vertically polarized light that passes through a polarizer at 70◦ .
From Malus’ Law
S = S0 cos2 θ
The ratio of output to input is then
S
= cos2 θ = cos2 (70◦ ) = 0.117
S0
Therefore, only 11.7 % of the light passes through the polarizer.
†
Problem from Essential University Physics, Wolfson