A Graduate Student Has Done a Careful Analysis of the Spectrum

question 3

Multiple Choice

A graduate student has done a careful analysis of the spectrum of a star. While she has found lines from many elements, there was not a trace of the element helium in the spectra she has been analyzing. From this she can now conclude:

• A) there is most likely no helium anywhere in the star
• B) all the helium must be in the core of the star; there is none of it in the outer regions
• C) since helium shows lines only in hot stars, this star must be relatively cool
• D) since helium is the kind of element that quickly bonds with others, all the helium in this star must be in the form of molecules
• E) the student was not surprised, because NO star ever shows any lines of helium

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Definitions:

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