Question

The wavelength of a photon is equal to the de
Broglie wavelength of a particle moving with a
velocity v. Find the kinetic energy of the particle.​

Answer 1

De-Broglie wavelength of particle = photon's wavelength

h/mv=λ

Kinetic Energy=1/2mv

2

and energy of photon =hc/λ.

Ratio=

(hc/λ)

(1/2mv

2

)

Substitute λ=

mv

h

to get ratio comes out to be 3/8.