3 ms·
The article did mention that the photo was long exposure, so it may not be possible to see it easily with the naked eye. A single photon emitted occassionally w
by craftyguy 9y ago
The article did mention that the photo was long exposure, so it may not be possible to see it easily with the naked eye. A single photon emitted occassionally would be pretty hard to see, even though the human eye can detect a single photon.