b.) Calculate the transmitted intensity after the second polarizer when 2 = 38.1
ID: 1556148 • Letter: B
Question
b.) Calculate the transmitted intensity after the second polarizer when 2 = 38.1°. Do not enter unit
c.) Calculate the transmitted intensity after the third polarizer when 3 = 61.7°. Do not enter units.
PART B
For each of the three sheets of polarizing material shown in the figure below, the orientation of the transmission axis is labeled relative to the vertical.
d.) The incident beam of light is unpolarized and has an intensity of 1190 W/m2. What is the intensity of the beam transmitted through the three sheets when 1 = 15.8°, 2 = 52.9° and 3 = 121°?
ofV FRExplanation / Answer
Apply Malus law to solve the problem
I1 = Io cos^2 theta
from the first sheet
I1 = 14.2 cos ^2 19.1
=12.67
from the second sheet
I 2= I1 cos^2 theta
I2 = 12.67 cos ^2 (38.1-19.1)
=11.32
from the third sheet
I3 = I2 cos ^2 theta
I3 = 11.32 cos^2 (61.7-38.1)
=9.5 units
(d)
from the first sheet
I1 = 1190 cos ^2 15.8
=1101.77 W/m^2
from the second sheet
I 2= I1 cos^2 theta
I2 = 1101.77 cos ^2 (52.9-15.8)
=700.88
from the third sheet
I3 = I2 cos ^2 theta
I3 = 700.88 cos^2 (121-52.9)
= 97.5W/m^2
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