Atomic StructureHard

Question

An electron, a proton and an alpha particle have kinetic energies of 16E, 4E and E respectively. What is the quantitative order of their de-Broglie wavelengths ?

Options

A.λe > λp = λα
B.λp = λα = λe
C.λp > λe > λα
D.λe > λα > λp

Solution

λe =
λp =
λα =
∴    λe > λp = λα.

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