If a Continuous Spectrum of Ultraviolet Radiation Passes Through a Tube

question 163

Multiple Choice

If a continuous spectrum of ultraviolet radiation passes through a tube of cool hydrogen gas, what happens to its spectrum?

• A) All the radiation passes unhindered except the Lyman L _\(\alpha\) wavelength, which is absorbed by the atoms.
• B) Some of the radiation at all wavelengths is absorbed, reducing the intensity at all wavelengths uniformly.
• C) All the radiation passes through the tube unhindered because the hydrogen gas is cool and cannot absorb energy.
• D) All the radiation passes through the tube unhindered except at the specific wavelengths of the Lyman series, L _\(\alpha\) , L _{\(\beta\) ,} and so on, which are absorbed by the atoms.

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