...Critical Angle, and total reflection occurs in the case of light passing into a less refracting medium if the angle of incidence is greater than the critical angle. The existence of total reflection is frequently taken advantage of in the construction of optical instruments,...

...rarer. The angle D o A at which total reflection just begins is called the critical angle, because if the angle of incidence is greater than the critical angle the ray is totally reflected, and if less the ray is refracted in the ordinary way. The critical angle,...

...from the spar to the balsam, is decreasing its speed. The first of these will be totally reflected if the angle of incidence is greater than the critical angle. The prism is so shaped that the angle of incidence is always greater than the critical angle. But the second...

...and at some critical angle the refracted ray will graze the interface (Figure 12.11). What happens if the angle of incidence is greater than the critical angle? The refracted ray has nowhere to go but to be reflected back into the original medium. Although none of...

...the optical clarity of the cladding is still important. So, why does the light enter the cladding? If the angle of incidence is greater than the critical angle, the light ray is reflected back into the first material by the process of refraction (TIR). To be refracted...