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3479249 Alexander Graham Bell\'s photo phone, 1891; (add.info.: Transmitter of Bell\'s Photo phone: vibrations of the diaphragm at the end of the mouthpiece tube caused pulses of light to be transmitted to receiver which had light-sensitive selenium. London, 1891.); Universal History Archive/UIG; out of copyright.
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Creative#:
TOP27536258
Source:
達志影像
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RM
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須由TPG 完整授權
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19thcentury19centuryXIXcenturyXIXthcenturybellcommunicationcommunicationslightinglightlightedelectricityelectricelectriciteelectricalvibrationsreceivertransmitterseleniumcell1890sreceiverelectriclightdiaphragmelectricalbell19thcenturyelectricityphotophonevibrationstransmitterseleniumcellcommunicationreceiverelectriclightdiaphragmelectricalbell19thcenturyelectricityphotophonevibrationstransmitterseleniumcellcommunication
1890s1919th19th19thXIXXIXthbellbellbellcellcellcellcenturycenturycenturycenturycenturycenturycommunicationcommunicationcommunicationcommunicationsdiaphragmdiaphragmelectricelectricelectricelectricalelectricalelectricalelectriciteelectricityelectricityelectricitylightlightlightlightedlightingphonephonephotophotoreceiverreceiverreceiverseleniumseleniumseleniumtransmittertransmittertransmittervibrationsvibrationsvibrations