Since , a minimum wavelength implies a maximum nu, i.e. a maximum energy. This is precisely the reverse of the photoelectric effect - now the KE of the electron gets converted into the energy of photons. This effect demonstrates the dynamics of individual photons. Photons are not just some abstract idea having to do with quantization of energy. They really do behave like particles.
Photons can collide with electrons, or even other photons.
We have a little problem, in that these kinds of collisions involve intrinsically relativistic particles, the photons are traveling at c, and the electron velocities are also plenty big. So, we'll have to use some relativity. This is a non-classical prediction. Maxwell's equations can describe light scattering from an electron, but would not predict this frequency shift.