Question

Consider a hypothetical annihilation of a stationary electron with a stationary positron. What is the wavelength of resulting radiation?

• A. $\frac{h}{m_{0}c}$
• B. $\frac{h}{2m_{0}c}$
• C. $\frac{2h}{m_{0}c}$
• D. $\frac{h}{4\pi m_{0}c}$

Answer 1

The correct option is A $\frac{h}{m_{0}c}$

According to De Broglie eave length

$\lambda =\frac{h}{mc}E=\frac{hc}{\lambda }$

$\lambda =\frac{hc}{E}=hc$

When an electron and a positron collide then a hypothetical annihilation of a stationary electron with a stationary position.