* Light behaves as both a wave and a particle (wave-particle duality): The experiment showed that light can knock electrons out of a metal surface (photoelectric effect), a phenomenon that could not be explained by classical wave theory alone. This led to the concept of light quanta or photons, which are discrete packets of energy behaving like particles.
* Energy of light is quantized: The energy of a photon is directly proportional to its frequency (E = hν, where h is Planck's constant). This means that the energy of light is not continuous but comes in discrete packets. The experiment showed that only photons with enough energy could eject electrons, explaining the observed threshold frequency for the photoelectric effect.
* The photoelectric effect is instantaneous: The emission of electrons occurs immediately upon illumination, even at low light intensities. This contradicted the classical wave theory, which predicted a time delay for electron emission depending on light intensity.
* Intensity of light affects the number of ejected electrons: The number of electrons emitted is proportional to the intensity of light. This means that brighter light produces more photons, which in turn eject more electrons.
In summary, the photoelectric experiment provided compelling evidence for the quantization of light energy and its particle-like nature, revolutionizing our understanding of light and laying the foundation for quantum mechanics.
