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Read features from the special edition View interactive material on lasers Read past Science News coverage Half a century ago, science took a step into science fiction when Theodore Maiman demonstrated that a method for making sharp beams of microwave radiation could be adapted to visible light. Those microwaves had been amplified by stimulated emission of the radiation, inspiring the acronym “maser.” Maiman showed how to do the same thing with optical radiation — visible light — hence the obvious parallel label of “laser” (although the Science News Letter cover story from July 23, 1960, referred to the “optical maser”). Eventually laser became the term applied to all similar devices emitting coherent radiation of various wavelengths. From death rays to bar code readers to light-beam scalpels for eye surgery, the laser has engaged the public’s attention and inspired popular awe like few other inventions. Its anniversary marks not merely a time to remember its history, but also an occasion to celebrate its many roles in everyday life and scientific research. From probing the inner workings of molecules to detecting gravity waves from deep space, lasers remain today a vital tool in the advance of science. | ||
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Ideas behind laser born long before device itself | ||
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Lasing beyond light Physicists focus on whole new types of waves, from beams of sound and plasma swells to looking for ripples in spacetime | ||
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Timeline | Inventing the light fantastic |
Slideshow | Lasers, lasers, everywhere |
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Laser History in the Making February 5, 1955 Feb. 16, 1957 April 12, 1958 February 7, 1959 July 23, 1960 October 15, 1960 December 31, 1960 January 20, 1962 March 31, 1962 November 7, 1964 October 24, 1981 | ||
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