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A proton and an electron initially at re...

A proton and an electron initially at rest are accelerated by the same potential difference. Assuming that a proton is 2000 times heavier than an' electron, what will be the relation between the de Broglie wavelength of the proton `(lambda_(p))` and that of electron `(lambda_(e))` ?

A

`lambda_(p) = 2000 lambda_( e)`

B

`lambda_(p) = lambda_(e)/2000`

C

`lambda_(p) = 20sqrt(5)lambda_( e)`

D

`lambda_(p) =lambda_(e)/(20sqrt(5))`

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