If a0 is the radius of first Bohr's orbi...

If `a_0` is the radius of first Bohr's orbit of H-atom, the de-Broglie's wavelength of an electron revolving in the 2nd Bohr's orbit will be

A

`4pia_(0)`

B

`2pia_(0)`

C

`6pia_(0)`

D

None of these

Verified by Experts

The correct Answer is:

A

`a_(0)=0.529xx(1^(2))/(1)`
`r_(a)=0.529xx(4)/(1)`
`r_(a)=4a_(0)`
`nlamda=2pir_(a)`
`=pi4a_(0)=4pia_(0)`.

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