Question

For each of the three sheets of polarizing material shown in the drawing, the orientation of the transmission axis is labeled relative to the vertical. The incident beam of light is unpolarized and has an intensity of 1200 W/m2. What is the intensity of the beam transmitted through the three sheets when 1 = 16.0°, 2 = 49.7°, and 3 = 105°?

Answer 1

Answer:

Half of the unpolarized light passes through the first sheet. The light that passes through the first sheet is polarized at 45

∘

relative to the second sheet, and the light that passes through the second sheet is polarized at 45

∘

relative to the third sheet. The fraction of transmitted light is given by two successive applications of Malus's law:

I

max

I

=

2

1

(cos

2

45.0

∘

)(cos

2

45.0

∘

)=

8

1

Explanation:

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