A ray of light travelling in a transparent medium of refractive index n falls, on a surface separating the medium from air at an angle of incidents of 45°. The ray can undergo total internal reflection for the following n,
A. n= 1.25
B. n = 1.33
C. n= 1.4
D. n= 1.5
Answer:D
A ray of light travelling in a transparent medium of refractive index n falls, on a surface separating the medium from air at an angle of incidents of 45°. The ray can undergo total internal reflection for the following n,
A. n= 1.25 B. n = 1.33 C. n= 1.4 D. n= 1.5