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3. Optical disk is an example of |
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Answer» Answer: The first recorded historical use of an optical disc was in 1884 when Alexander Graham Bell, Chichester Bell and CHARLES Sumner Tainter recorded SOUND on a glass disc using a beam of light. Optophonie is a very early (1931) example of a recording DEVICE using light for both recording and playing back sound SIGNALS on a transparent photograph.
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