JEE Advanced 2019 Physics question
A free hydrogen atom after absorbing a photon of wavelength gets excited from the state to the state . Immediately after that the electron jumps to state by emitting a photon of wavelength . Let the change in momentum of atom due to the absorption and the emission are and , respectively. If , which of the option(s) is/are correct? [Use eV nm; 1 nm m, and are Planck's constant and speed of light, respectively]
Answer: (A),(D)
Solution
Absorbed energy eV, so nm. nm (B false), so the emitted energy is eV
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