The de-Broglie wavelength of a proton and an electron are equal. The it follows that

The de Broglie wavelength of a proton and an electron are same, then what is the relation between their kinetic energies?

The wavelength associated with a photon and the de Broglie wavelength of a moving electron are equal. If they carry the same amount of energy, what is the value of this wavelength?

If an electron and a proton have the same KE , the ratio of the de Broglie wavelengths of proton and electron would approximately be

If the de - Broglie wavelengths for a proton and for an alpha - particle is equal , then what is the ratio of velocities for proton and alpha particle?