Reversibility of light is seen in A. Reflection B. Refraction C. Both D. None
Hint: The principle of reversibility of light is needed to be considered for finding out the answer.
Complete step by step solution: The principle of reversibility states that light follows the same path if the direction of light is reversed. The refractive index of light when it passes from the first medium to the second medium is the same as the refractive index of light when it goes from second medium to the first medium. So, from here we can say that reversibility of light is seen in reflection and refraction both.
Therefore, the answer is both i.e., option C.
Additional information: A common example of reversibility of light which we can see is that when a ray of light is incident on a side of a rectangular glass slab the incident ray is parallel to the emergent ray of light.
Note: The principle of reversibility of light is an outcome of Snell’s Law.