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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 Rayban 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.
 Spring '08
 Mckay

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