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Consider an electron in a hydrogen atom,...

Consider an electron in a hydrogen atom, revolving in its second excited state (having radius `4.65Å` ). The de-Broglie wavelength of the electron is

A

`12.9 Å`

B

`3.5 Å`

C

`9.7 Å`

D

`6.6 Å`

Text Solution

Verified by Experts

The correct Answer is:
C
`2pi r = n lambda `
`rArr 2pi r = 3 lambda`
`lambda = 9.7 Å`
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