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does IR photodiode(reciever part not ir led) glow under mobile camera? Answered

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IR Photodiode used to generate current based on the IR light it receives across it's pin. As Photodiode is not an LED it dosen't glow.

no, the detector doesn't glow, because it isn't emitting light....

no, the detector doesn't glow, because it isn't emitting light....

No the receiver doesn't emit any light.