This time we are looking on the crossword clue for: Iridescent gems.
it’s A 15 letters crossword puzzle definition. See the possibilities below.
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Possible Answers: OPALS.
Last seen on: –L.A. Times Daily Crossword – May 16 2022
–NY Times Crossword 31 Jan 22, Monday
–The Washington Post Crossword – May 5 2019
–LA Times Crossword 5 May 19, Sunday
Random information on the term “OPALS”:
Free-space optical communication (FSO) is an optical communication technology that uses light propagating in free space to wirelessly transmit data for telecommunications or computer networking. “Free space” means air, outer space, vacuum, or something similar. This contrasts with using solids such as optical fiber cable or an optical transmission line. The technology is useful where the physical connections are impractical due to high costs or other considerations.
Optical communications, in various forms, have been used for thousands of years. The Ancient Greeks used a coded alphabetic system of signalling with torches developed by Cleoxenus, Democleitus and Polybius. In the modern era, semaphores and wireless solar telegraphs called heliographs were developed, using coded signals to communicate with their recipients.
In 1880, Alexander Graham Bell and his assistant Charles Sumner Tainter created the photophone, at Bell’s newly established Volta Laboratory in Washington, DC. Bell considered it his most important invention. The device allowed for the transmission of sound on a beam of light. On June 3, 1880, Bell conducted the world’s first wireless telephone transmission between two buildings, some 213 meters (700 feet) apart.