I've always seen that all the old model remotes that is used in DVD players or TVs, it emits electromagnetic waves, having wavelength somewhere in the Infrared region. But when my phone's average quality camera (Moto E) is held between the emitter and my eyes, it converts the infrared into visible ones and shows a whitish purple colour. I don't know why always the purple is shown. I'll be very happy if you explain this to me. Thank you.
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