Physics for IGCSE & O level - Rays And Waves (Section 4 - No. 34)
If the refractive index is 1.5, and the angle of incidence is 30 degrees, what is the angle of refraction?
19.5 degrees
45 degrees
60 degrees
0 degrees
ব্যাখ্যা
Using Snell's Law, sin(30)/sin(r) = 1.5, therefore r = arcsin(sin(30)/1.5) which is approximately 19.5 degrees