Dark lines that appear in the spectra observed in stellar atmospheres indicate the fact that
A) atoms that would produce light of the darkened frequency bands aren't present in the atmosphere.
B) atoms are present in the atmosphere that have electrons that are absorbing photons of those frequencies.
C) atoms are present in the atmosphere that have electrons that are emitting photons of those frequencies
D) atoms that would produce light of the darkened frequency bands are forbidden from doing so because of quantum effects.

Question

Quizplus · Accepted Answer

Dark lines indicate that there are atoms in the atmosphere that are absorbing photons of specific frequencies, causing a decrease in the intensity of light at those frequencies. This is known as absorption spectroscopy and is commonly used to study the chemical composition of celestial objects.

Dark Lines That Appear in the Spectra Observed in Stellar