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Maiman used a solid-state light-pumped synthetic ruby to produce red laser light at a wavelength of 694 nanometers (nm). Ruby lasers are still in use. Rubies are also used in applications where high hardness is required such as at wear-exposed locations in mechanical clockworks, or as scanning probe tips in a coordinate measuring machine.
Scholars have suggested that the myth may have originated with snake worship, or light reflected by a serpent's eye, or the flame color of certain snakes' lips. In only a relative few of these legends is the stone luminous, this variant being known in India, Ceylon, ancient Greece, Armenia, and among Cherokee Indians (Ball 1938: 502).
When light strikes a material, most of the light is absorbed while a smaller amount of a particular frequency or wavelength is reflected. The part that is reflected reaches the eye as the perceived color. [37] A ruby appears red because it absorbs all other colors of white light while reflecting red.
The first working laser was a ruby laser made by Theodore H. "Ted" Maiman at Hughes Research Laboratories on May 16, 1960. [1] [2] Ruby lasers produce pulses of coherent visible light at a wavelength of 694.3 nm, which is a deep red color. Typical ruby laser pulse lengths are on the order of a millisecond.
Also known as photobiomodulation, red light therapy uses continuous beams of low-energy red light between 600 and 700 nanometers in wavelength, Dr. Huh says. The light doesn’t generate heat.
The Cambodian 'sunset' ruby is 50 times more rare than a diamond, and there has been no significant raw gem discovery in the last 20 years. A flawless sunset ruby the size of a fingernail can ...
The word ruby comes from ruber, Latin for red. The color of a ruby is due to the element chromium. Some gemstones that are popularly or historically called rubies, such as the Black Prince's Ruby in the British Imperial State Crown, are actually spinels. These were once known as "Balas rubies".
What is red light therapy? Red light therapy is also known as low-level laser therapy, says Ife J. Rodney, M.D., a dermatologist and founding director of Eternal Dermatology + Aesthetics ...
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