If light from a hot, dense star is viewed through a cool cloud of gas (See Figure 5-17 of Universe, 11th ed.):

A)the spectrum of the star will still be seen unchanged because the gas cloud is cool.
B)only specific wavelengths of light will be removed from the spectrum.
C)the whole spectrum will be reduced in intensity.
D)the atoms of the gas cloud will add energy to the overall spectrum, producing emission lines at specific wavelengths.

Question

If light from a hot, dense star is viewed through a cool cloud of gas (See Figure 5-17 of Universe, 11th ed.):
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A)the spectrum of the star will still be seen unchanged because the gas cloud is cool. 
B)only specific wavelengths of light will be removed from the spectrum. 
C)the whole spectrum will be reduced in intensity. 
D)the atoms of the gas cloud will add energy to the overall spectrum, producing emission lines at specific wavelengths.

Quizplus · Accepted Answer

The cool cloud of gas will absorb certain wavelengths of light, resulting in specific lines being missing from the spectrum. This creates an absorption spectrum.

If Light from a Hot, Dense Star Is Viewed Through