The Photoelectric Effect : Light and Electrons

The video explains the dual nature of light as both a particle and a wave, focusing on the photoelectric effect as evidence of its particle nature. Albert Einstein's 1905 explanation using Planck's theory is discussed, along with the experimental setup involving metal plates and light of varying frequencies. The concept of threshold frequency is introduced, highlighting that only light above this frequency can eject electrons from metal surfaces. The video also explores how increasing light frequency and intensity affects the kinetic energy and number of ejected electrons.

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