A coherent beam of 1.937 eV photons is incident on a double slit. A screen is L = 1.8 m away from the source and the width of each slit is a = .010 mm. This creates an interference/diffraction pattern such that the second interference maxima is y₂ = 46 mm from the center line.

If we wanted to duplicate this interference/diffraction pattern with monoenergetic electrons of mass m_e = 9*10^-31 kg,
what would the kinetic energy of one of these electrons have to be? eV