Interesting! So much higher than for neutrinos. One follow up question. When reading about low-light cameras, the number of photons per pixel seem much small

Interesting! So much higher than for neutrinos. One follow up question. When reading about low-light cameras, the number of photons per pixel seem much smaller. I guess the following factors are involved: Several orders of magnitude reduction under low light. Pixel area likewise much smaller than thumb. Exposure time less than a second. Visible light vs. all spectrum. Well, the question: Do the numbers fit? :-)