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If the total energy of an electron in a ...

If the total energy of an electron in a hydrogen like atom in an exited state is ` - 3.4 eV` , the the de-Broglie wavelength of the electron is :

A

`6.6 xx 10^(-10) m`

B

`3 xx 10^(-10) m`

C

` 5 xx 10^(9)m`

D

` 9.3 xx 10^(-12)m`

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The correct Answer is:
A
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