The Adaptability of the Retina
المؤلف:
GEORGE A. HOADLEY
المصدر:
ESSENTIALS OF PHYSICS
الجزء والصفحة:
p-500
2025-12-22
513
The Adaptability of the Retina of the eye as a screen for receiving the image formed - because of its concave shape- is shown as follows:
Demonstration. - Fix a convex lens in the shutter of a dark room. Place a white paper screen in such a position that the middle of the image of the landscape will be in focus. The edges will be blurred and indistinct. Now bend the screen into the form of a section of the surface of an upright cylinder, and all parts of the picture on a horizontal line will be equally distinct. Turn the screen to other positions and observe the effect.
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