Question
Polariation (Please show work)
A beam of initially unpolarized light (intensity l0) is sent through polarizer A, and the intensity of the plane polarized light that emerges is lA. The polarized light lA then passes through a second polarizer B, which can be so that its polarization axis forms angle between 0degree and 90degree to the axis of polarizer A. The intensity of the light that emerges from polarizer B is l0. (You do NOT need to show your for this problem.) What is IA/Is (the fraction of l0 that is transmitted through polarizer A)? ____________ if Is has 80.0% of the intensity of IA, what is the angle between the axes of the two polarizer?____________ if Is has only 80.0% of the intensity of IA, what is the angle between the axes of the two polarizer?____________ if Is only if Is has only 80.0% of the intensity of IA, what is the angle between the axes of the two polarizer? ____________ Suppose that you want to use a magnifying glass to read the newspaper in your old age.
Explanation / Answer
a) IA/I0 =1/2
b) IB=IA*cos^2(theta)
==> 0.8=cos^2(theta)
==> theta = 26.56 degrees
c) IB=IA*cos^2(theta)
==> 0.3=cos^2(theta)
==> theta = 56.79 degrees