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MMLU / You observe the visible spectrum of a star viewed through a cloud of cool…

Problem

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question

You observe the visible spectrum of a star viewed through a cloud of cool hydrogen gas.

choices

  1. You see only the star’s blackbody spectrum.
  2. You see the star’s blackbody spectrum with absorption lines due to hydrogen.
  3. You see only emission lines characteristic of hydrogen.
  4. You see only emission lines characteristic of the star’s composition.

subject

astronomy

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Source and history

Official source

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