A beam of unpolarized light of intensity I 0 passes through a series of ideal po

Question

A beam of unpolarized light of intensity I0 passes through a series of ideal polarizing filters with their polarizing directions turned to various angles as shown in the figure (Figure 1) . Assume that ? = 75.0?.

Part A

What is the light intensity (in terms of I0) at points A, B, and C?

Answer in the order indicated. Separate your answers with commas.

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Part B

If we remove the middle filter, what will be the light intensity at point C?

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Figure 1 of 1

A beam of unpolarized light of intensity I0 passes through a series of ideal polarizing filters with their polarizing directions turned to various angles as shown in the figure (Figure 1) . Assume that ? = 75.0?.

Part A

What is the light intensity (in terms of I0) at points A, B, and C?

Answer in the order indicated. Separate your answers with commas.

IAI0,IBI0,ICI0 =

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Part B

If we remove the middle filter, what will be the light intensity at point C?

I?C =

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Figure 1 of 1

Explanation / Answer

At point A I = 1/2*I0

Use Malus Law to find I at B and C

IB = IA*cos^2(?) = 1/2*I0*cos^2(75) = 0.0335 *I0

IC = IB*cos^2(?) = 0.0335*I0*cos^2(15) = 0.031256*I0

If we remove the middle filter, what will be the light intensity at point C?

IC = IA*cos^2(?) =0

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