Light is made of photons, and our night vision is limited by the ability of our visual system to detect these photons. In some ways, our eyes approach the fundamental physical limit for light detection, being able to detect light flashes of less than a dozen photons.
0:00 Introduction
0:37 Photoreceptors and photons
1:52 Experiment
3:22 Rhodopsin
3:59 Signal to noise
6:00 Limitations
6:55 Conclusion
References:
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Baylor DA, Lamb TD, Yau KW. The membrane current of single rod outer segments. J Physiol. 1979 Mar;288:589-611.
Rieke F, Baylor DA. Single-photon detection by rod cells of the retina. Rev Mod Phys. 1998 Jul 70(3):1027-1036.
9 июн 2024
