Spectral lines are of particular importance in astronomy because
A) each different element has a characteristic line spectrum.
B) they can be observed through a diffraction grating.
C) they are the only light bright enough to be seen over long distances.
D) only stars produce bright line spectra.

Question

Quizplus · Accepted Answer

Each different element has a characteristic line spectrum, which allows astronomers to determine the composition of stars and other celestial bodies by analyzing the light they emit.

Spectral Lines Are of Particular Importance in Astronomy Because