Elementaarlaengu

Elementaarlaengu, often denoted by the symbol e, represents the magnitude of the electric charge carried by a single electron or proton. It is the fundamental unit of electric charge in nature. While an electron carries a negative elementary charge (-e) and a proton carries a positive elementary charge (+e), all observable charges are integer multiples of this fundamental unit. This concept, known as quantization of charge, was first experimentally demonstrated by Robert Millikan in his oil-drop experiment in the early 20th century. The approximate value of the elementary charge is 1.602 x 10^-19 coulombs. It is a fundamental constant in physics and plays a crucial role in understanding electromagnetism, atomic structure, and particle physics. The elementary charge is a key parameter in many physical laws and equations, including Coulomb's law, which describes the force between electric charges. Its discovery and precise measurement were significant milestones in the development of modern physics.