What should be the angle of incidence so that a ray of light when passed through a rectangular glass slab - Science - Light

Question

What should be the angle of incidence so that a ray of light when
passed through a rectangular glass slab remain undeviated

Decoder_2 · Accepted Answer

Dear
student,
refer to the link below for the answer to the similar query,

https://www meritnation
com/ask-answer/question/a-ray-of-light-falls-normally-on-a-face-of-glass-slab-what-a/light-reflection-and-refraction/1932841
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What should be the angle of incidence so that a ray of light when passed through a rectangular glass slab remain undeviated