Suppose You Want to Know the Chemical Composition of a Distant

question 68

Multiple Choice

Suppose you want to know the chemical composition of a distant star.Which piece of information is most useful to you?

• A)The peak energy of the star's thermal radiation.
• B)The Doppler shift of the star's spectrum.
• C)The wavelengths of spectral lines in the star's spectrum.
• D)Whether the star's spectrum has more emission lines or more absorption lines.

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