Determine the de Broglie wavelength of:

A$.$ An electron with kinetic energy of $1\mathrm{.}2$ eV

B$.$ An alpha particle, also with kinetic energy $1\mathrm{.}2$ eV$.($An alpha particle is a helium nucleus with two protons and two neutrons. It has mass of $6\mathrm{.}644$x$10$²⁷ kg$).$

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Given Data Plancks constant h 6626 x 1034 m2 kg s The energy of a particle E can be related to its d... View the full answer