p235w11_practice_exam_3_2_sol

D 3 points how would this pattern differ if dna was

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Unformatted text preview: ill with pitch P? Draw your diagram next to the original below and be sure to point out any features which are different. Picture looks the same, except the 4th layer line is present…. 6: (5 points) You’re looking out at the calm Caribbean sea watching the sun sink toward the horizon. This reflected light is strongly polarized parallel to the surface and appears as glare. When you put on your Ray-ban polarized sunglasses they completely block the polarized glare from the reflected light. How far over must you tilt your head before 20% of the total polarized intensity of the reflected light gets through? I = I0cos2, and initially the angle between the polarization of the light (which is horizontal) and the polarizers in your glasses is 90. We want to make I/I0 = 0.2 = cos2, so = 63. This means you must tilt your head over 27 from the vertical. 7: (5 points) Chose two of the following waves which would, when combined, produce a standing wave of the kind we discussed in class. After you circle your two choices, please write a one or two sentence description of the reasoning behind your choice. a) b) c) d) e) f) 6.0sin(4.2x – 0.9t) 6.0sin(-4.2x + 0.9t) 3.0sin(4.2x – 0.9t) 6.0sin(-4.2x - 0.9t) 3.0sin(-4.2x + 0.9t) 6.0cos(4.2x + 0.9t) These two waves must have the same wavelength and frequency, the same amplitude, and travel in opposite directions. The waves described in a, b, c, and e all travel to the right, those in...
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This test prep was uploaded on 02/15/2014 for the course PHYSICS 235 taught by Professor Mckay during the Spring '08 term at University of Michigan.

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