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Question

Does a ray of light incident normally on a refracting surface does not suffer any refraction?

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Solution

Yes.
According to snell's law
μ1sini=μ2sinr
When rays is perpendicular to surface and incidence angle is i=0
So μ1sin0=μ2sinr
sinr=0
r=0o
So ray will pass without deviation.

685797_524046_ans_2dc2c5c5909c4c7c96483302e9937317.png

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