College Physics
2nd Edition
ISBN: 9780134601823
Author: ETKINA, Eugenia, Planinšič, G. (gorazd), Van Heuvelen, Alan
Publisher: Pearson,
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Chapter 25, Problem 33P
25.6 Polarization and light reflection
* An unpolarized beam of light passes through two polarizing sheets that are initially aligned so that the transmitted beam is maximal. By what angle should the second polarized sheet be rotated relative to the first to reduce the transmitted intensity to (a) one-half and (b) one-tenth the intensity that was transmitted through both polarizing sheets when aligned?
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Students have asked these similar questions
P.11
A beam of polarized light of intensity 10 passes through a sheet of ideal polarizing material. The
polarization axis of the beam and the transmission axis of the sheet differ by 60°. What is the
intensity of the emerging light?
a) 0.87
b) 0.75
c) 0.50
d) 0.25
Part 2
Suppose you want to rotate the plane of polarization of a beam of polarized light by 65°, but you do not want the final intensity to be less
than 64% of the initial intensity. What is the minimum number of polarizing sheets you must use? Assume that each sheet is rotated the
same angle relative to the adjacent sheets.
sheets
Part A
Unpolarized light with an original intensity Io
passes through two ideal polarizers having their
polarizing axes turned at 180 ° to each other.
After passing through both polarizers, the intensity
of the light is
글 Lo.
O * Io
2
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