Question

Principle of reversibility holds true for
(A) Reflection
(B) Refraction
(C) Reflection and refraction
(D) None of these

Answer 1

Hint:In order to answer this question,we have to observe how the light travels after getting reflection or refraction from the surface of the medium and based upon the observations we are able to arrive at the correct answer.

Complete Step by Step Answer:
According to the principle of reversibility of light, if the path of the light is reversed after suffering a number of reflections and refractions, then it retraces its path.

Path of rays of light is reversible or light traces back it’s path while travelling in the reverse direction or a ray of light can pass in either direction along the same path.So, principle of reversibility holds true for both reflection and refraction.
Hence option C is correct answer Reflection and refraction

Note: When ray retrace its path then angle of incidence becomes angle of refraction and angle of refraction becomes angle of incidence. We can understand it by diagram easily

If ray retraces its path then i becomes r and r becomes i.