Question

(viii) The observation made by Swarali while doing the experiment are given
below. Based on these write answers to the following questions :
Swarali found that the light ray travelling from the denser medium
to a rarer medium goes away from the normal. If the angle of incidence
(i) is raised by Swarali, the angle of refraction (r) went on increasing.
However, after certain value of the angle of incidence, the light ray is
seen to return back into the denser medium.
So, Swarali has some questions. Answer them.
(a) Name this certain value of i. What is the value of r at that time?
(b) Name this process of returning of light in the denser medium. Explain
the process​

Answer 1

Answer:

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