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Civil Engineering Mcqs

Critical angle of electromagnetic radiation takes place if__________________?

 (A)  Angle of incidence is equal to angle of refraction

 (B)  Angle of incidence is greater than the angle of refraction

 (C)  Angle of incidence is equal to 90°

 (D)  Angle of refraction is equal to 90°

Submitted By :Ali Uppal

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