What is the wavelength of the line in the hydrogen spectrum that is comprised of transitions from the n = 5 to the n = 3 levels?
a. 1880 nm
c. 2250 nm
b. 1290 nm
d. 1920 nm
B
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About where is our solar system located within the Milky Way Galaxy?
a) about half way from the center of the galaxy to the outskirts of the galactic disk b) in the halo of the galaxy about the galactic disk c) near the far outskirts of the galactic disk
This diagram shows a probability map of electron positions in an atom. Blue represents a high probability of finding the electron, while black represents zero probability of finding the electron. Which statement is true as we understand it today?
A) The electron can "jump" from the inner blue region to the outer blue region without crossing the space in between. B) An electron in the inner blue region can never move to the outer blue region. C) We say that the black region is "excluded," in accord with the exclusion principle. D) The electron can move from the inner blue region to the outer blue region only by moving through the black region at high speed.
How do we expect that the first Earth-sized extrasolar planets will be discovered (if they exist)?
A) by the transit technique from an observatory in space B) with photographs from a new generation of large, ground-based observatories C) by NASA's Terrestrial Planet Finder mission D) by the Doppler technique
Estimate the number of pennies that would fit in a box one foot across by one foot wide by one foot tall
A) 5 × 102 B) 5 × 103 C) 5 × 104 D) 5 × 105 E) 5 x 104