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An electron mass m with an initial veloc...

An electron mass m with an initial velocity `vecv=v_0hati (v_0>0)` is in an electric field `vecE=-E_0hati(E_0=constant>0)`. Its de-Broglie wavelength at time t is given by

A

(a) `(lambda_0)/[1+(eE_0)/m t/v_0]`

B

(b) `lambda_0(1+(eE_0t)/(mv_0))`

C

(c) `lambda_0`

D

(d) `lambda_0t`

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