A beam of light of two different wavelengths enters a pane of glass 3.00 mm thick at an angle of incidence of 56°. The indices of refraction for the two different colors are 1.514 and 1.528
Because of dispersion, the colored beams, although parallel, are separated by a small distance. How far apart are they? A) 0.057 mm
B) 0.0083 mm
C) 0.025 mm
D) 0.014 mm
E) 0.0062 mm
D
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Which of the following is not consistent with observations of the cosmic microwave background?
A) The universe is at least 20 billion years old. B) The universe is geometrically "flat" (in the four dimensions of spacetime). C) Dark energy, whatever it is, represents the majority of the energy content of the universe. D) The matter density (both luminous and dark matter combined) in the universe is only about one-fourth of the critical density.
What is the angular separation of two spectral lines of wavelengths 497 nm and 251 nm formed in the third order with a diffracting grating having 587 lines per millimeter?
A) 34.8° B) 24.8° C) 41.3° D) 29.4° E) 4.21°
A succession of 2-m long water waves on a lake goes by a piece of floating cork that bobs up and down one complete cycle each second. What is the speed of the wave?
A) 0.25 m/s B) 0.50 m/s C) 1.0 m/s D) 2 m/s E) 4 m/s
Except Mercury's orbit, the rest of the planets' orbital planes are inclined by no more than _____
A) 4.6° B) 5.2° C) 6.3° D) 3.4°