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de-Broglie wavelength of electron in 2^(...

de-Broglie wavelength of electron in `2^("nd")` excited state of hydrogen atom is: [where `r_(0)` is the radius of `1^("st")` orbit in H-atom]

A

`2pia_(0)`

B

`4pia_(0)`

C

`8pia_(0)`

D

`16pia_(0)`

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Verified by Experts

The correct Answer is:
B
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