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Incandescent bulbs have a shorter life than most other lighting, an important factor if replacement is inconvenient or expensive. Some types of lamp, including incandescent and fluorescent, emit less light as they age; this may be an inconvenience, or may reduce effective lifetime due to lamp replacement before total failure.
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.
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.