Suppose You Want to Know the Chemical Composition of a Distant

question 118

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

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