An electron and alpha particle have the same de-Broglie wavelength associated with them. How are their kinetic energies related to each other?

An electron and alpha particle have same debrogile wavelength associated with them. How are their kinetic energy related to each other?

If photon and an electron have same de-Brogile wavelength then.

Calcualte the ratio of the accelerating potential requied to accelrate a deutron and alpha particle to have the same de-Broglie wavelength assoiated with them.Given,mass of deutron = 3.2 xx 10^(-27) kg and mass of alpha particle = 6.4 xx 10^(-27) kg .

A proton, a neutron, an electron and alpha -particle have the same energy. Then their de-Broglie wavelengths compare is