1938Civil EngineeringMedium
Critical angle of electromagnetic radiation takes place if________?
AAngle of incidence is equal to angle of refraction
BAngle of refraction is equal to 90°
CAngle of incidence is equal to 90°
DAngle of incidence is greater than the angle of refraction
Correct answer
B. Angle of refraction is equal to 90°
Explanation
The correct answer is Angle of refraction is equal to 90°.