A continuous spectrum is produced by ____
a. atoms that become ionized
b. electrons that transfer from a high energy level to a low energy level
c. electrons that transfer from a low energy level to a high energy level
d. the intensity of agitation of atoms in a hot gas
e. the motion of an object toward or away from the observer
d
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The sky is flat, like a sheet of paper, and hence angular diameter is the distance measured along that flat sheet of paper
a. True b. False Indicate whether the statement is true or false
One of the effects of Mercury's very slow spin is:
A) extreme variations in its surface temperature. B) an intensely powerful magnetic field. C) tectonic activity. D) wind patterns that are slow, but global in size. E) large variations in the size of its polar cap.
Bright lines in an emission spectrum represent:
A) regions from which light travels more rapidly and reaches us more quickly B) flaws in the telescopes and spectroscopes that astronomers use to measure spectra C) photons absorbed when an electron jumps from a lower to a higher energy level D) particular energies of light that are emitted from a distant object E) photons absorbed when an electron jumps from a higher to a lower energy
A Sense of Proportion: Arrange the following discoveries from earliest to most recent: