When light passes from a material with a low index of refraction into material with a high index of refraction:
a. some light is reflected with a 180 change of phase.
b. none of the light is reflected. c. some light is reflected without a change of phase.
d. the light that is not reflected has a 180 change of phase.
[Ques. 2] What is (are) the unit(s) for the diffusion constant?
a. m2
b. m2/s
c. It is unitless.
d. m/s1/2
[Ques. 3] Two flat glass plates are in contact along one end and are separated by a sheet of tissue paper at the other end. A monochromatic source of wavelength 490 nm illuminates the top plate. If 20 dark bands are counted across the top plate, what is the paper thickness? (1 nm = 10-9 m) Note that a dark band occurs where the plates contact.
a. 2.7 10-6 m
c. 4.7 10-6 m
b. 3.4 10-6 m
d. 4.9 10-6 m
[Ques. 4] What is the internal energy of a monatomic ideal gas with pressure 6 105 Pa and with volume 2 m3?
a. 6 105 J
b. 18 105 J
c. 9 105 J
d. More information is needed to find this value.
[Ques. 5] Two flat glass plates are in contact along one end and are separated by a sheet of paper 3.0 10-6 m thick at the other end. The top plate is illuminated by a monochromatic light source of wavelength 490 nm. How many dark parallel bands will be evident across the top plate? (1 nm = 10-9 m) Note that a dark band occurs where the plates contact.
a. 13
c. 9
b. 7
d. 17
[Ques. 6] The internal energy of a monatomic ideal gas is equal to which of the following?
a. (3/2)PV
c. 3T/P
b. (3/2)nT/V
d. none of these
[Ques. 7] Two closely spaced parallel glass plates are separated by 900 nm. What wavelength light source in the visible region (390 nm to 710 nm) will experience maximum transmission through the two plates?
a. 684 nm
c. 500 nm
b. 600 nm
d. 429 nm
[Ques. 8] A quantity of a monatomic ideal gas expands to four times the volume while maintaining the same pressure. If the internal energy of the gas were U0 before the expansion, what is it after the expansion?
a. U0
b. 2U0
c. 4U0
d. The change in temperature must also be known to answer this question.
[Ques. 9] A beam of light of wavelength 600 nm is incident along the normal to two closely spaced parallel glass plates. For what air gap separation between the plates will the transmitted beam be of maximum intensity? (1 nm = 10-9 m)
a. 75 nm
c. 410 nm
b. 300 nm
d. 150 nm
[Ques. 10] What is the internal energy of 42 moles of Neon gas (molecular mass = 20 u) at 27C? (R = 8.31 J/mol K)
a. 1.9 105 J
b. 1.6 105 J
c. 3.8 103 J
d. It depends on the container size, which is not given.
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