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Файл:Lectures Physics 2 / 2-1.ppt
Total Internal Reflection
(1.9)
Total Internal Reflection
Optical Fibers
Light travels in a curved transparent rod by multiple internal reflections.
The construction of an optical fiber. Light travels in the core, which is surrounded by a cladding and a protective jacket.
Fermat’s Principle
Fermat’s principle states that when a light ray travels between any two points, its path is the one that requires the smallest time interval. 