Which of the following conditions lead you to see an absorption line spectrum from a cloud of gas in interstellar space?

The cloud is extremely hot.

The cloud is visible primarily because it reflects light from nearby stars.

The cloud is cool and lies between you and a hot star.

The cloud is cool and very dense, so that you cannot see any objects that lie behind it.

Question

Physics

Michaela Barrera

1 August, 13:06

Which of the following conditions lead you to see an absorption line spectrum from a cloud of gas in interstellar space?

The cloud is extremely hot.

The cloud is visible primarily because it reflects light from nearby stars.

The cloud is cool and lies between you and a hot star.

The cloud is cool and very dense, so that you cannot see any objects that lie behind it.

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Answers (1)

Know the Answer?

Mike Mccormick · Answer 1

The answer is; The cloud is cool and lies between you and a hot star.

Absorption lines occur when the electrons of an atom absorb energy through a specific wavelength of light and the electrons 'jumps' from a lower energy level to a higher energy level. Absorption lines are viewed as black lines in a continuous spectrum