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Arago phenomenon


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The relatively greater sensitivity of peripheral vision as compared to central vision in dim light, owing to the physiological characteristics of scotopic vision, in particular the distribution of rods on the retina. Ancient astronomers were the first to notice that when observing the night sky, stars can be seen in peripheral vision that disappear when fixated directly. See fovea. [Named after the French astronomer and physicist (Dominique) François (Jean) Arago (1786–1853) who first examined it in detail]

Subjects: Psychology.


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