An Astronomer Obtains Two Samples of Rarefied Gas

question 63

Multiple Choice

An astronomer obtains two samples of rarefied gas.She heats the first gas and finds that it produces a spectra with a series of bright lines.She places the other gas in front of a hot blackbody and finds a continuous spectrum with a series of dark lines.If the wavelengths of the dark lines are the same as those of the bright lines,she infers that the samples have identical:

• A) reflectivity.
• B) opacity.
• C) compositions.
• D) temperatures.

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Definitions:

Break-Even Point

The financial point at which total revenues equal total expenses, resulting in no profit or loss.