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.

Question

Quizplus · Accepted Answer

Atoms in a hot, low-density gas emit a spectrum of specific colors at specific wavelengths, which are unique to the type of atom in the tube. This is known as an emission spectrum. The positions of the lines do not change with the temperature of the gas, making option D the correct answer.

Atoms in a Hot,low-Density Gas (E