Absorption Lines Due to Interstellar Gas

question 23

Multiple Choice

Absorption lines due to interstellar gas

• A)are wider than the lines from stars because the gas is hotter than most stars.
• B)are narrower than the lines from stars because the gas has a lower pressure than stars.
• C)indicate that the interstellar medium contains dust.
• D)indicate that the interstellar medium is expanding away from the Sun.
• E)None of the other choices are correct.

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Definitions:

Economic Depression

A prolonged period of significant decline in economic activity across an economy, characterized by high unemployment rates, low output, and a contraction in spending and investment.

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