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Homework Statement An electron, initially at rest, is accelerated by a potential V in a vacuum and then travels horizontally in a region of space where there is an electric field, E, and a magnetic field, B. The fields are aligned such that the electron is subjected to a force eE upwards and a...

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Homework Statement In quantum mechanics the de Broglie wavelength of an object depends on its momentum according to λ=h/p where h is Planck's constant. Protons of charge e and mass m are accelerated from rest through a potential V. What is their de Broglie wavelength? A) 2h/\sqrt{}meV...