List of top Physics Questions on Kinetic Energy asked in IIT JEE

The energy of a photon is equal to the kinetic energy of a proton. The energy of the photon is E. Let $\lambda_1$ be the de-Broglie wavelength of the proton and $\lambda_2$ be the wavelength of the photon. The ratio $\frac{\lambda_1}{\lambda_2}$ is proportional to