JEE Main 2020 Physics question
An electron (mass m) with initial velocity is in an electric field . If is initial de-Broglie wavelength of electron, its de-Broglie wave length at time t is given by :
Answer: (B)
Solution
The paper's own working gives λ = λ0/√(1 + e²E0²t²/(2m²v0²)), which is option (B);
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