Reflected and Diffused Light
المؤلف:
GEORGE A. HOADLEY
المصدر:
ESSENTIALS OF PHYSICS
الجزء والصفحة:
p-443
2025-12-16
10
Whenever light strikes upon a highly polished surface, the greater part of the light will be reflected regularly, a parallel beam being reflected as a parallel beam. If, however, the surface is not polished, the reflected rays are not parallel but are scattered, and diffused light is the result. Bodies that are not self-luminous are made visible by the light which they diffuse. A perfectly reflecting surface is invisible Demonstration. - Let a beam of sunlight strike upon a mirror and it will be reflected, giving a brilliant spot of light upon the wall. Replace the mirror by a sheet of plain white paper and the light will be scattered or diffused. Each ray of light is reflected according to the law of reflection, but the unevenness of the surface of the paper causes the reflected rays to scatter in various directions, as shown in Fig. 1
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