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An incandescent light bulb, incandescent lamp or incandescent light globe is an electric light with a filament that is heated until it glows. The filament is enclosed in a glass bulb that is either evacuated or filled with inert gas to protect the filament from oxidation. Electric current is supplied to the filament by terminals or wires ...
The Sony CDP-101 was the world's first commercially released compact disc player. [1] The system was launched in Japan on October 1, 1982 at a list price of 168,000 yen (approx US$730). [2] The Japan-only launch was partially because Philips, Sony's partner in the development of the CD format, was unable to meet the original agreed launch date.
Nick Holonyak Jr. (/ h ʌ l ɒ n j æ k / huh-LON-yak; November 3, 1928 – September 18, 2022) was an American engineer and educator.He is noted particularly for his 1962 invention and first demonstration of a semiconductor laser diode that emitted visible light.