The light of someone's life might not be just another person, but light in the literal sense. According to a recent study by researchers from University of Calgary, every living system emits light without requiring external excitation due to a biological phenomenon known as ultraweak photon emission (UPE).
Probably worth mentioning that this is not some kind of barely percetible flash of light that is emitted as an organism expires.
… What it actually is, is a variety of different metabolic processes emit extremely weak photons as part of the various chemical reactions involved in keeping a living thing alive… and so when that thing is dead, those metabolic processes cease.
Probably worth mentioning that this is not some kind of barely percetible flash of light that is emitted as an organism expires.
… What it actually is, is a variety of different metabolic processes emit extremely weak photons as part of the various chemical reactions involved in keeping a living thing alive… and so when that thing is dead, those metabolic processes cease.