Atoms in a Hot,low-Density Gas (E

Multiple Choice

Atoms in a hot,low-density gas (e.g. ,in a laboratory-type spectral source) emit a spectrum that is

A) a series of specific colors at the same wavelengths,independent of the type of atom excited.
B) a series of specific colors,whose positions change as the gas temperature changes.
C) continuous over all visible wavelengths,with maximum intensity in the blue.
D) a series of specific colors,unique to the type of atom in the tube,but fixed in position even when the gas temperature changes.