High School Physics

Critical Angle for the glass-air interface

Last updated on April 21st, 2023 at 02:36 pm

The Critical Angle for the glass-air interface is 42 degrees. This means if the ray of light in the glass medium strikes the separating surface between glass and air making an angle more than 42 degrees with the normal to the point of incidence then that ray of light will undergo a total internal reflection and comes back to the glass medium.

Critical angle for the diamond air interface

Sparkle of diamond

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