An electron and a photon have same wavelength of `10^(-9)` m. If E is the energy of the photon and p is the momentum of the electron, the magnitude of E/p in SI units is

Options

A. `1.00 xx10^(-9)`
B. `1.50 xx10^(-9)`
C. `3.00 xx10^(8)`
D. `1.20 xx10^(7)`

Answer

C

Explanation

`E/p=h/(2m_plamda)`