An electron of mass m with an initial velocity 
enters an electric field 
constant 
at 
If 
is its de‐Broglie wavelength initially, then its de‐Broglie wavelength at time t is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Here, 
; initial velocity 
Force acting on electron due to electric field
Acceleration produced in the electron,
Now, velocity of electron after time 
or 
Now, 
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