MasteringPhysics: Week 8 - Google Chrome Secure l https://session.masteringphysi

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MasteringPhysics: Week 8 - Google Chrome Secure l https://session.masteringphysics.com/myct/itemView?assignmentProblemID-8676 1961 WeekProblem 25.78 Resourcas previous| 6 of 6 return to assignment Problem 25.78 Part A IP A beam of vertically polarized light encounters two polarizing filters, as shown in the figure(Figure 1) Rank the three cases, A, B, and C, in order of decreasing transmitted intensity Rank cases from highest to lowest transmitted intensities. To rank items as equivalent, overlap them. ResetHelp Figure 1 of 1 22.5 Case A 90° Highest 2.5 Case A Case B Case C Case B 22.5 Case C The correct ranking cannot be determined. Submit My Answers Give Up O Type here to search 6-29 PM 10/19/2017

Explanation / Answer

We know that from Malus law

I=I0 Cos^2(theta)

the angle is less, the value of of cosine function increases

fig A
theta = 90 degrees , I = I0 cos^2 (90)

fig B

theta = 0 degrees, I = I0 cos^2 (0)

fig C

theta = 45 degrees, I = I0 cos^2 (45)

So the ranking decreasing transmitted intensity is A,C,B

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