Question

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4) While Subhash was doing experiment the observations are given below.
He had some questions do you answer of these questions?
While Subhash was doing experiment a light is going from denser
medium to rare medium it bends away from the normal. If he increases the
value of incident angle (i). The value of (r) refiracted angle also increases for a
particular value of (i). Such rays return to the denser medium.
a) Name the particular value of i?
b) What should be the value of r at that time?
c) Name the phenomenon when light rays returns to the denser medium?​

Answer 1

Answer:

Happy New year friend!!

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Answer 2

Explanation:

1) The specific value of angle is called Critical angle.

2) The process of reflection of incident ray into denser medium is called Total internal reflection.

3) Answer is in the figure.