Photoelectric effect: What is photoelectric effect

What is photoelectric effect . How can it be explained from the work function. Learn its history, discovery, formula, and application. What was Einstein’s explanation. The photoelectric effect has three important characteristics that cannot be explained by classical physics: (1) the absence of a lag time, (2) the independence of the kinetic energy of photoelectrons on the intensity of incident radiation, and (3) the presence of a cut-off frequency. This process is called the photoelectric effect (or photoelectric emission or photoemission), a material that can exhibit this phenomenon is said to be photoemissive, and the ejected electrons are called photoelectrons; but there is nothing that would distinguish them from other electrons. Photoelectric Effect The photoelectric effect is a phenomenon where metals emit electrically charged particles upon absorbing electromagnetic radiation. Specifically, it involves the ejection of electrons from a metal surface. This effect is the foundation of modern physics as it addresses a fundamental question about the nature of light. Albert Einstein famously explained this phenomenon in 1905. However, Heinrich Rudolf Hertz laid the groundwork for the photoelectric effect theory in 1887 ...