Suppose You Want to Know the Chemical Composition of a Distant

question 113

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

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