What is Principle of Reversibility?

Asked by Vimesh | 17th Oct, 2015, 10:25: AM

Expert Answer:

If a ray of light, after suffering any number of reflections and/or refractions has its path reversed at any stage, it travels back to the source along the same path in the opposite direction. This is called principle of reversibility of light.
PQ = QP, QR = RQ, RS = SR, ST = TS but direction will be opposite.

Answered by Faiza Lambe | 17th Oct, 2015, 12:30: PM