If the threshold energy for the photoelectric emission of an electron from a metal is 3 x 10-15 J, what will happen when a photon with 5 x 10-15 ) hits the surface of the metal? A A photon with 2 x 10-15 J of energy will be produced. B Nothing will happen. Photons are not capable releasing electrons from a metal surface. C An electron will be ejected with 2 x 10-15 ) in excess kinetic energy. D Nothing will happen. A photon must have exactly the right amount of energy for an electron to be released.