Light is reflecting off a wedge-shaped thin piece of glass producing bright and dark interference fringes. If a certain location has a bright fringe, a nearby point will have a bright fringe if the thickness of the glass increases by:
a. one wavelength of the light.
c. 1/8 of a wavelength of the light.
b. 1/4 of a wavelength of the light.
d. 1/2 of a wavelength of the light.
D
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Indicate whether the statement is true or false
When you look into a pool of water, the depth looks less than it actually is because of
a. interference. b. diffraction. c. specular reflection. d. refraction. e. polarization.
What happens during a penumbral lunar eclipse? a. Earth only partially enters the penumbra. b. Earth enters the entire penumbra
c. The Moon partially enters the penumbra. d. The Moon only partially enters the umbra. e. Earth only partially enters the penumbra.
A saber-toothed-tiger's bones contain 1/32 of the amount of 14C that is contained in the bone material of living animals. The half-life of 14C is 6000 years. From this information, we can conclude
A) that the tiger died about [i.e., plus or minus a few thousand years] 42,000 years ago. B) nothing at all, because 14C dating is known to be inaccurate. C) nothing at all, because of the uncertainties associated with radioactive decay. D) that the tiger died about 18,000 years ago. E) that the tiger died about 30,000 years ago.