The critical angle for a material X is 45°. The total internal reflection will take place, if the angle of incidence in the denser medium is :
A. less than 45°
B. 90°
C. more than 45°, but not 90°
D. less than 45°, but not zero degree
Answer:C
The critical angle for a material X is 45°. The total internal reflection will take place, if the angle of incidence in the denser medium is :
A. less than 45° B. 90° C. more than 45°, but not 90° D. less than 45°, but not zero degree