hello, i am writing a report on wave particle duality and i have included the experiments you would expect. young's inteference patterns as evidence for light as a wave, and the photo electric effect providing evidence for light as a particle. etc. what i am concerned about is does the photoelectric effect explicitly show light as a particle? i understand that all the energy required for a photon to be ejected must arrive all at once in a 'discrete' (i use this term because i believe it is the correct way to describe this, but i could use some clarification as to what it actually means) packet. this does seem to show that light is a particle. also increasing the intensity of the light does not increse the kinetic energy of the emmitted electrons, but increasing the frequency of the light does(which is a wave idea of light). i know that the conclusion of my report will be that light is a quantum particle that exhibits both wave and particle like behaviour, but is the photo electric effect evidence for light as a particle, or for light as a particle and a wave? that was rather long winded, so i have just one more question. if the photoelectric effect is used to argue that light exhibits both properties, what is a convincing piece of evidence for light just as a particle? i'm sure there must be some, because many great scientists were convinced it was for a long time! thanks for any help you can give. lntz.