The de Broglie wavelenght of an electron...

The de Broglie wavelenght of an electron is `0.4xx10^(-10)` m when it kinetic energy is `1.0 kev`. Its wavelenght will be `1.0xx10^(-10)m`. When its kinetic energy is

`0.2KeV`

`0.8KeV`

`0.63KeV`

`0.16KeV`

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