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 transition 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.
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Question

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 transition 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.

Select all that apply

G1 Physics · Accepted Answer

Step 1: Use Wien's displacement law λₘT = constant together with the photoelectric relation hν = φ + Kₘₐₓ. The stated temperature change gives A: Some of the incident wavelengths will be absent in A.; C: B will contain some visible light.; D: B will contain some infrared light..