He didn't say he saw it with his naked eye though.
However, at least by some metrics, the human eye can detect even a single photon. So if he shut off all other sources of visible light in the room, and sat there for a bit, he should start seeing the light (assuming he's young, red light perception decreases the older you get).
But then, for this to work, the only detail you need on your side is proof that only one atom is emitting light.
However, at least by some metrics, the human eye can detect even a single photon. So if he shut off all other sources of visible light in the room, and sat there for a bit, he should start seeing the light (assuming he's young, red light perception decreases the older you get).
But then, for this to work, the only detail you need on your side is proof that only one atom is emitting light.