At critical angle of incidence the angle of refraction is ……………………..
At critical angle of incidence the angle of refraction is ……………………..
A) 0°
B) 90°
C) 45°
D) 180°
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At critical angle of incidence the angle of refraction is ……………………..
A) 0°
B) 90°
C) 45°
D) 180°