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A beam of ultraviolet light of all wavel...

A beam of ultraviolet light of all wavelengths passes through hydrogen gas at romm temperatrue, in the x-direction. Assume that all photons emitted due to electron transition inside the gas emerge in the `y`-drection, Let A and B denote the lights emergion from the gas in the x and y directons repectively.

A

some of the incident wavelenghts will be absent in A.

B

only those wavelengths will be present in which are absent in A

C

B will contain some visible light

D

B will contain some infrared light

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The correct Answer is:
A, C, D
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