Critical angle of electromagnetic radiation takes place if____________

1.	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°
Answer» E.

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Critical angle of electromagnetic radiation takes place if__________________?

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