A He ion in the excited state on transition to the ground state emits two photons in succession with wavelengths 108 5 nm anc 30

Question

A He ion in the excited state on transition to the ground state emits two photons in succession with wavelengths 108 5 nm anc 30 4 nm What is the quantum number n corresponding to the excited state of He ion

Kunduz · Accepted Answer

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