Absorption Lines Due to the Interstellar Medium Indicate That Some

question 27

Multiple Choice

Absorption lines due to the interstellar medium indicate that some components of the interstellar medium are cold and of a very low density.How do they show this?

• A)The lines are blue shifted.
• B)The lines are red shifted.
• C)The lines are extremely broad.
• D)The lines are extremely narrow.

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