If light from a hot,dense star passes through a cool cloud of gas (see Figure 3-49,Comins,Discovering the Essential Universe,6th ed.):
A) the atoms of the gas cloud will add energy to the overall spectrum, enhancing it at specific wavelengths to produce emission lines.
B) the cool gas will not affect the spectrum of the star because cool atoms cannot absorb light.
C) the whole spectrum will be reduced in intensity.
D) only specific wavelengths of light will be removed from the spectrum.

Question

Quizplus · Accepted Answer

When light from a hot, dense star passes through a cool cloud of gas, the atoms in the gas absorb specific wavelengths of light, resulting in absorption lines in the spectrum.

If Light from a Hot,dense Star Passes Through a Cool