Wave-particle Duality

In PhysicsA wave, like light, can behave as either a wave or a particle.
When light of a high enough frequency is shone on to a metal, electrons can be liberated from that metal. This is light behaving as a particle since it acts as a collision. The photon energy is calculated by the product hf, where h is Plank’s Constant and f is the frequency of the light. Any excess energy over the Work Function of the metal is carried away on the electrons that have been liberated.
When light of the right wavelength is shone on to a diffraction grating, it forms a distinct interference pattern of light and dark bands corresponding to constructive and destructive interference. This is an example of light acting as a wave.
HoweverElectrons when fired at correct speeds are particles that can behave with wavelike properties. Use the DeBroglie formula to calculate the wavelength from the electron momentum.A beam of fast moving electrons can be diffracted when passed through a crystal lattice providing the wavelength is compatible with the interatomic spacing of the material.
Electrons can obviously behave as particles too by colliding with its antiparticle to produce GAMMA WAVES