Describe the photoelectric effect and explain how it support the particle nature of light?

The photoelectric effect is the phenomenon where electrons are ejected from a material when it is exposed to light of sufficient frequency. This effect demonstrates the particle nature of light, as it shows that light can be thought of as discrete packets of energy called photons, each carrying a specific amount of energy proportional to its frequency. When photons collide with electrons, if the energy of the photon exceeds the material's work function, the electron is emitted. This behavior cannot be explained by wave theory alone, as it requires the concept of quantized energy levels, supporting the idea that light exhibits both wave-like and particle-like properties.