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PhysicsJEE Main 6 Apr 2026, Shift 2·Q22·Numerical·Easy–moderate

Dual Nature of Radiation and Matter · Matter waves

The de Broglie wavelength for an electron accelerated through the potential difference V1V_1 volt is λ1\lambda_1. When the potential difference is changed to V2V_2 volt, the associated de Broglie wavelength is increased by 50%. If (V1/V2)=(9/α)(V_1/V_2) = (9/\alpha), then the value of α\alpha is .
We corrected a printing error in the original paper

Source printed “The de Broglie weave length”.

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