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The radius of first Bohr orbit is x, the...

The radius of first Bohr orbit is x, then de-Broglie wavelength of electron in 3rd orbit is nearly

A

`2pix`

B

`6pix`

C

9x

D

`(x)/(3)`

Text Solution

Verified by Experts

The correct Answer is:
B
`r_(n)=n^(2)r_(1)`
`r_(3)=9r_(1)=9x`
`mvr=n(h)/(2pi)`
`mv9x=3(h)/(2pi)`
`(h)/(mv)=6pix`
`lamda=6pix`
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