Question

what is principle of the reversibility of light?




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Answer 1

the original path of the ray of light after a number of reflection and refraction retraces again its whole path covering same distance is called the principle of reversibility light .

Answer 2

The principle that if a beam of light is reflected back on itself, it will traverse the same path or paths as it did before reversal. The principle of reversibility states that light will follow exactly the same path if its direction of travel is reversed.