Among the given options regarding helium's interaction with light, the statement that is true is:
Helium can emit light with the same wavelength.
This is correct because when helium absorbs light of a specific wavelength, it can later release that energy in the form of light, which can involve emitting light at the same wavelength again.
The other statements are not accurate:
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Helium cannot absorb any other wavelength of light: This is false because gases can absorb multiple wavelengths depending on their electronic transitions.
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Helium can absorb any light that is an integer multiple of this wavelength: This is misleading; absorption depends on the specific energy levels and transitions available in helium, not merely integer multiples.
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This wavelength is precisely half the wavelength of the red light absorbed by hydrogen: This is also not necessarily true; the relationship between wavelengths absorbed by different elements depends on their electronic structures, and such a direct relationship is not guaranteed.
Thus, the correct answer is that helium can emit light with the same wavelength it absorbed.