An electron and proton have the same de-Broglie wavelength. Then the kinetic energy of the electron is

Options

A. Zero
B. Equal to the K.E. of the proton
C. Less than the K.E. of the proton
D. More than the K.E of the proton

Answer

D

Explanation

`(h)/( sqrt(2m_eE_e)) = (h)/(sqrt(2m_PE_P))`
`therefore m_e E_e = m_P E_P therefore E_e/E_P = m_P/m_e therefore E_e gt E_P`