Light passes through three ideal polarizing sheets. Unpolarized light enters the

Question

Light passes through three ideal polarizing sheets. Unpolarized light enters the first sheet and the resultant vertically polarized beam continues through the second sheet and third sheet. The second sheet has its transmission axis at 50 degrees with respect to the first sheet, and the third sheet is at 70 degrees with respect to the first sheet.

(a) What percent of the original intensity emerges from filter #1?

(b)What percent of the original intensity emerges from filter #2?

(c)What percent of the original intensity emerges from filter #3?

Must show all work for best answer

Explanation / Answer

a) always lose half on first

so 0.5 or 50%

b) 0.5*cos(50 degrees)^2=0.207 or 20.7%

c) now you lose 70-50 = 20

0.5*cos(50 degrees)^2*cos(20 degrees)^2=0.182 or 18.2 %

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