Polarization - Physics FOR THIS IMAGE, ANSWER ALL THE FOLLOWING CLEARLY AND IN O

Question

Polarization - Physics

FOR THIS IMAGE, ANSWER ALL THE FOLLOWING CLEARLY AND IN ORDER:

Identical beams of light are incident on three different pairs of (ideal) polarizers. The double arrow drawn on each polarizer represents its direction of polarization. Suppose that the incident light in each case were unpolarized. Rank the three cases (A-C) according to theintensity of the light transmitted past the second polarizer, from largest to smallest. If for any case no light is transmitted past the second polarizer, state that explicitly. Explain your reasoning. Now suppose that the incident light in each case were polarized in the vertical direction. Rank the three cases (A-C) according to theintensity of the light transmitted past the second polarizer, from largest to smallest. If for any case no light is transmitted past the second polarizer, state that explicitly. Explain your reasoning.

Explanation / Answer

Part A)

Apply I = .5(Iocos2(angle)

Case A

I/Io = .5(cos245)

I/Io = .25

Case B

I/Io = .5(cos260)

I/Io = .125

Case C

I/Io = .5(cos245)

I/Io = .25

That means Case A and C tie as the largest with case B in second place

Part B)

In this part, the light is already polarized vertically

Case A

I/Io = cos2(45)

I/Io = .5

Case B

I/Io = cos2(60)

I/Io = .25

Case C

I/Io = 0

Thus Case A is the largest, followed by case B, and then case C

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