A hydrogen atom is excited to the n = 11 level. Its decay to the n = 7 level is detected in a photographic plate. What is the wavelength of the light photographed? (c = 3.00 × 108 m/s, 1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s)
A) 7,510 nm
B) 4,670 nm
C) 12,400 nm
D) 4,380 nm
A
Physics & Space Science
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The wavelength of a light beam is doubled. Which one of the following is correct for the momentum of photons for that light beam?
A) It is halved. B) It stays the same. C) It is doubled. D) It is reduced by one-fourth E) It is quadrupled.
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What is unusual about the rotational (spin) and orbital periods of Venus?
What will be an ideal response?
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How many arcseconds are in one arcminute?
A) 10,000
B) 60
C) 360
D) 100
E) 3600
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