Find out the number of waves made by a ...

Find out the number of waves made by a bohr electron in one complete revolution in its third orbit.

`9`

`3`

`6`

`12`

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The correct Answer is:

According to de Broglie's concept, the circulference of an allowed Bohr orbit must eual an intergral number of waves:
`2pir = nlambda`
For the `3rd` orbir, `n = 3`, waves are made by a Bohr's electron in one complate revolution in its `3rd` orbit.

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