Q.
An electron (mass m) with an initial velocity v=voi^ is in an electric field E=Eoj^. If initial wavelength λ0=h/mvo then its de Broglie wavelength at time t is given by .
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a
λ0
b
λ01+e2E02t2m2v02
c
λ01+e2E02t2m2v02
d
λ01+eEtmv0
answer is C.
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Detailed Solution
V=u+at=V0i^−emE0tj ^& V=V02+e2E02t2m2 λ=hmv=hmV021+e2E02t2mv2=hmv01+e2E02t2m2V02=λ01+e2E02t2m2V02
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