What Speed Must An Electron Have If Its Momentum Is To Be The Same As That Of An X-ray Photon With A Wavelength Of 0.32 Nm?

According to the de-Broglie, every particle has a wave associated with it. The wavelength of the wave is inversely proportional to the momentum of the particle.

wavelength = plank's constant/ momentum

Wavelength = h/ p

p= momentum= mass x velocity= mv

wavelength= h/mv

v= h/ m x wavelength

mass=9.1 x 10^-31 kg

h= 6.67 x 10^-34 j.sec

wavelength= 0.32 nm = 0.32 x 10^-9 meters

speed= 6.67 x 10^-34 j.sec/ 9.1 x 10^-31 kg*0.32 x 10^-9 meters

speed= 2.3 x 10⁶ meter/ sec