AxisSample Problem:An unpolarized light with an intensity of 100 W/m?passes through two polarizing filters that areoriented at an angle of 40° to each other. What isthe intensity of the light that emerges from eachAxisUnpolarized lightother?Polarized lightGiven:Solution:1, = 100 W/m? 1= % lol = ½ (100)h = 50 W/m?2 = Iocos202 = (50) cos?(40)= (50)(0.77)?= (50)(0.59)2= 29.5 W/m?PolarizerAnalyzere = 40°%3DFigure 1. When unpolarized light is incident on the firstpolarizer the intensity of the transmitted light is exactlyhalf (50%) no matter how the polarizing axis is oriented.The brightness of the polarized light decreases as theangle, e, increases between the transmission axis of thesecond polarizer and the plane of polarization of the light.ACTIVITY: Calculate the following problems using Malus' Law.1. A beam of unpolarized light with an intensity of 75 W/m? passes through two polarizing filters that are55° with respect to each other. What is the intensity of light that emerges through each filter?2. The angle between the axes of two polarizing filters is 45°. By how much does the second filter reducethe intensity of the light coming through the first when the intensity of the unpolarized light that passedthrough them is 110 W/m??

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1. A beam of unpolarized light with an intensity of 75 W/m? passes through two polarizing filters that are 55° with respect to each other. What is the intensity of light that emerges through each filter? 2. The angle between the axes of two polarizing filters is 45°. By how much does the second filter reduce the intensity of the light coming through the first when the intensity of the unpolarized light that passed through them is 110 W/m2?

1. A beam of unpolarized light with an intensity of 75 W/m? passes through two polarizing filters that are 55° with respect to each other. What is the intensity of light that emerges through each filter? 2. The angle between the axes of two polarizing filters is 45°. By how much does the second filter reduce the intensity of the light coming through the first when the intensity of the unpolarized light that passed through them is 110 W/m2?

College Physics

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ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

Axis
Sample Problem:
An unpolarized light with an intensity of 100 W/m?
passes through two polarizing filters that are
oriented at an angle of 40° to each other. What is
the intensity of the light that emerges from each
Axis
Unpolarized light
other?
Polarized light
Given:
Solution:
1, = 100 W/m? 1= % lo
l = ½ (100)
h = 50 W/m?
2 = Iocos20
2 = (50) cos?(40)
= (50)(0.77)?
= (50)(0.59)
2= 29.5 W/m?
Polarizer
Analyzer
e = 40°
%3D
Figure 1. When unpolarized light is incident on the first
polarizer the intensity of the transmitted light is exactly
half (50%) no matter how the polarizing axis is oriented.
The brightness of the polarized light decreases as the
angle, e, increases between the transmission axis of the
second polarizer and the plane of polarization of the light.
ACTIVITY: Calculate the following problems using Malus' Law.
1. A beam of unpolarized light with an intensity of 75 W/m? passes through two polarizing filters that are
55° with respect to each other. What is the intensity of light that emerges through each filter?
2. The angle between the axes of two polarizing filters is 45°. By how much does the second filter reduce
the intensity of the light coming through the first when the intensity of the unpolarized light that passed
through them is 110 W/m??

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