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  • When an electron jump- from n = 4 to n = 2 then change in angular momentum is approximately.

When an electron jump- from n = 4 to n = 2 then change in angular momentum is approximate.

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\\\text{Angular momentum of electron in nth state, } J_{n}=\frac{n h}{2 \pi}$ \\ Change in angular momentum, $\Delta J=\left(n_{1}-n_{2}\right) \frac{h}{2 \pi}$ \\ $\therefore \Delta J=\frac{(4-1) h}{2 \pi}=\frac{3 h}{2 \pi}$

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