The Gas in the Interstellar Space Between Stars Is Very

question 108

Multiple Choice

The gas in the interstellar space between stars is very tenuous (thin) but can be heated to a very high temperature in the vicinity of a hot star. This hot, tenuous gas will emit

• A) light at certain wavelengths only (spectral lines), the wavelength of a given spectral line depending on the gas temperature.
• B) light at certain wavelengths only (spectral lines), the wavelength of the lines being independent of gas temperature.
• C) light at all wavelengths, the continuous spectrum peaking at a certain wavelength or color depending on temperature.
• D) no light at any wavelength because hot thin gases do not emit light.

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