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Sahay Sir > Question Answers > JEE Mains Physics 2002-2019 Solved Video Solutions > Chapter 18 - Atoms and Nuclei > The electron in hydrogen atom first jumps from third excited state to second excited state and subsequently to the first excited state. The ratio of the respective wavelength λ1:λ2 of the photons emitted in this process is

The electron in hydrogen atom first jumps from third excited state to second excited state and subsequently to the first excited state. The ratio of the respective wavelength λ1:λ2 of the photons emitted in this process is

Radiation com in g from transitions n = 2 to n = 1 of hydrogen atoms fall on He+ ions in n = 1 and n = 2 states. The possible transition of helium ions as they absorb energy from the radiation is :