Question

The angle of incidence i and refraction r are equal in a transparent slab when the value of i is *



(a) 0°
(b) 45°
(c) 90°
(d) depend on the material of the slab


please give me the correct answer if you know??
: I have doubt in 0° and 90°
so,clear that which one is correct??​

Answer 1

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Answer 2

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