Question

if a ray incident normally on the surface separating two media passes indurated what will be the value of refraction​

Answer 1

Answer:

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Explanation:

Why does a ray of light falling normally on the surface separating two media passes undeviated?

Q: Why does a ray of light falling normally on the surface separating two media passes undeviated?

A: “The ray falling normally” means it is perpendicular to the surface. The angle of incidence, i.e. the angle measured between the ray and the normal, is therefore 0° and its sinus is also 0. According the Snell’s law, angle of the refracted ray follows the rule

When sinus (theta1) is zero, sinus(theta2) will be always zero no matter the value of the refraction indices.