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 at large distances.
D) only stars produce bright line spectra.

Question

Quizplus · Accepted Answer

Spectral lines are important in astronomy because each different element has a unique line spectrum, allowing astronomers to identify the composition of stars and other celestial objects.

Spectral Lines Are of Particular Importance in Astronomy Because