• HugeNerd@lemmy.ca
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    24 hours ago

    Technically, every forward-biased rectifier emits EM of wavelength and intensity depending on materials.

    1N4007 silicon rectifier emits a few THz photons when forward biased.

    Use different materials and you have a LED, an inefficient rectifier but great light source.

    Tube rectifier with high enough voltage

    https://tubedata.jp/sheets/135/1/1DG3A.pdf