Stimulated emission

1917-1960 Stimulated emission

The book of science

Tom Sharp

Albert Einstein, Charles Hard Townes, James P. Gordon, Theodore Harold Maiman physics

Stimulated emission

Masers and lasers

Theoretically possible

Masers and lasers have thousands of uses, such as in barcode scanners, CD players, laser printers, laser pointers, welding and cutting, and eye surgery. The International Bureau of Weights and Measures uses a hydrogen maser as an atomic frequency standard. Masers occur naturally in space, even in the tails of comets.

See also in The book of science:

Readings on wikipedia: