Key experiments that led to the realization that light consists of particles include the photoelectric effect and Planck's blackbody radiation. The photoelectric effect, notably studied by Albert Einstein, demonstrated that light can eject electrons from a material, supporting the particle theory of light. Planck's work on blackbody radiation introduced the concept of quantized energy levels, further reinforcing the particle nature of light. The discussion highlights the importance of these experiments in the historical development of quantum theory. Understanding these foundational experiments is crucial for grasping the dual nature of light.
