Unpolarized light of intensity I0 passes through two sheets of ideal polarizing material. If the transmitted intensity is 0.375I0, what is the angle between the polarizers?
a. 22.5
c. 30
b. 60
d. 45
[Ques. 2] Of the following systems, which contains the most heat?
a. 100 kg of water at 80C
c. 600 kg of ice at 0C
b. 250 kg of water at 40C
d. Systems do not contain heat.
[Ques. 3] The intensity of unpolarized light passing through a single sheet of polarizing material changes by a factor of:
a. 0.5.
c. cos2 q.
b. 1.
d. cos q.
[Ques. 4] A temperature of 233 K equals which of the following?
a. 506C
c. 40F
b. 40C
d. 40F
[Ques. 5] Polaroid sunglasses help when skiing on snow on a sunny day by reducing the sunlight from the snow. This light from the snow has been polarized by:
a. optical activity.
c. reflection.
b. selective absorption.
d. double refraction.
[Ques. 6] An interval of one Celsius degree is equivalent to an interval of:
a. one Fahrenheit degree.
c. 5/9 Fahrenheit degree.
b. one kelvin.
d. 5/9 kelvin.
[Ques. 7] When the Sun is located near one of the horizons, an observer looking at the sky directly overhead will view partially polarized light. This effect is due to which of the following processes?
a. double refraction
c. selective absorption
b. optical activity
d. reflection
[Ques. 8] Carbon dioxide forms into a solid (dry ice) at approximately -157F. What temperature in degrees Celsius does this correspond to?
a. -157C
c. -105C
b. -93C
d. -121C
[Ques. 9] A beam of polarized light of intensity I0 passes through a sheet of ideal polarizing material. The polarization axis of the beam and the transmission axis of the sheet differ by 45. What is the intensity of the emerging light?
a. 0.25I0
c. 0.50I0
b. 0.87I0
d. 0.75I0
[Ques. 10] Normal body temperature for humans is 37C. What is this temperature in kelvins?
a. 296
c. 393
b. 310
d. 273
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