A proton has kinetic energy keV which is equal to that of a photon

PHYSICS · Single correct · A Level · Physics · Particles and radiation · Particles and radiation

Problem

A proton has kinetic energy

E = 100

keV which is equal to that of a photon. The wavelength of photon is

\lambda_2

and that of proton is

\lambda_1

. The ration of

\lambda_2/\lambda_1

is proportional to (1)

E^2

(2)

E^{1/2}

(3)

E^{-1}

(4)

E^{-1/2}