A retinal rod can respond to one photon; conscious vision usually takes several arriving close together. This compact FAQ explains the difference and points to 1942 experiments, rather than treating a faint flash as proof. One photon can trigger a receptor; that doesn’t mean your brain sees a single-pixel notification.
Original page: https://math.ucr.edu/home/baez/physics/Quantum/see_a_photon.html
Full Switchboard article: https://switchboardtechservices.com/articles/ancient-web-a-1996-physics-faq-explained-whether-humans-can-see-a-single-photon/
#ancientweb #physics #vision #sciencehistory
Original page: https://math.ucr.edu/home/baez/physics/Quantum/see_a_photon.html
Full Switchboard article: https://switchboardtechservices.com/articles/ancient-web-a-1996-physics-faq-explained-whether-humans-can-see-a-single-photon/
#ancientweb #physics #vision #sciencehistory
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Categories: Ancient Web & Internet History [c23]