A beam of ultraviolet light of all wavelengths passes through hydrogen gas at room temperature, in the x-direction. Assume that all photons emitted due to electron transitions inside the gas emerge in the y-direction. Let A and B denote the lights emerging from the gas in the x- and y-directions respectively.(a) Some of the incident wavelengths will be absent in A. (b) Only those wavelengths will be present in B which are absent in A. (c) B will contain some visible light. (d) B will contain some infrared light.

A beam of ultraviolet light of all wavelengths passes through hydrogen

1.	A beam of ultraviolet light of all wavelengths passes through hydrogen gas at room temperature, in the x-direction. Assume that all photons emitted due to electron transitions inside the gas emerge in the y-direction. Let A and B denote the lights emerging from the gas in the x- and y-directions respectively.(a) Some of the incident wavelengths will be absent in A. (b) Only those wavelengths will be present in B which are absent in A. (c) B will contain some visible light. (d) B will contain some infrared light.
Answer» Correct Answer is: (a, c, & d)

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