Question

The ratio of the deBroglie wave length for the electron and proton moving with same velocity is:

[$m_p$- mass of propton, $m_e$-mass of electron]

• A. $m_p:m_e$
• B. $m_p^2:m_e^2$
• C. $m_e:m_p$
• D. $m_e^2:m_p^2$

Answer 1

The correct option is A $m_p:m_e$

$\frac{{\lambda }_e}{{\lambda }_p}=\frac{\frac{h}{m_{e}V}}{\frac{h}{m_{p}V}}$

$=\frac{m_p}{m_e}$