Question

i will mark at brainliest. state the principal of reversibility of light

Answer 1

According to principal of reversibility of light,if path of a light ray is reversed at a point then entire path of light ray is reversed.
n12=1/n21
Hope it is helpful for u.

Answer 2

The principal 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 principal of reversibility state that light will follow exactly the same path if its direction of travel is reversed