Observed that the ray, 'Fi', falling on a prismoid ring, 'ABC', is refracted and bent in the direction, 'iR', and falling on the side 'AC', at an angle of incidence greater than the critical, is totally reflected in the direction, 'Re', vintage line Calendar #395686674
Observed that the ray, 'Fi', falling on a prismoid ring, 'ABC', is refracted and bent in the direction, 'iR', and falling on the side 'AC', at an angle of incidence greater than the critical, is totally reflected in the direction, 'Re', vintage line Calendar #395686674
