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Safari File Edit View History Bookmarks Window Help 2120 Homework-10 + A http://www.webassign.net/web/Student/Assignment-Responses/submit?dep-8800110 li Question on...cminds.com Potatoes Pl...ome Recipes peanut butte...ing) Recipe Bodybuildin... Fitness.com Frequently ...d QuestionsVerified We...sOnFire.com Osneaker Ni...s and Shoes C Q webassign Please Be Clear | Chegg.com 2120 Homework-10 7. -18 points My Notes | Walker1 25.P.066 A helium-neon laser emits a beam of unpolarized light that passes through three Polaroid filters, as shown in Figure 25-29, where 2 = 31°. The intensity of the laser beam is Io 3 = 90° 2 Figure 25-29 (a) What is the intensity of the beam at point A? (b) What is the intensity of the beam at point B? (c) What is the intensity of the beam at point C? (d) If filter 2 is removed, what is the intensity of the beam at point C? 0 0 0 0 19

Explanation / Answer

when light passes through point A, light intnesity falls by 50 %

i.e at A ,I1= I = 0.5 Io

at point B,I2= I = I0 cos^(theta/2)

I = 0.5I0 * cos^2 (31/2)

I = 0.0918 Io

at point C, I3 = Io* cos^2(90-31/2)

I = 0.00608 Io

after removing the filter, I4 as I2 = 0.0918 Io

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