Critical angle for total internal reflection

The maximum input acceptance angle for a fiber-optic cable is determined by the critical angle for total internal reflection, which is given by Snell s law ... 

A lead glass fibre has a refractive index of 1.682. What is the critical angle for total internal reflection at the interface with an acrylic coating with refractive index 1.498 ... 

Figure 10.6 Refraction (Snell s law) and (internal) reflection at a glass-air dielectric interface. The graph depicts the reflectivityforBK7-glassfor532 nm (0532 = 1.5195), forboth s-and p-polarization components. The locations of the Brewster angle 0B and the critical angle for total internal reflection 6c are indicated...

A few polymer chains chemically end labeled with a fluorescent probe (NBD) are mixed to the polymer melt (4). The sample is a drop of this mixture (optical index, 03), squeezed between a moving plate and the upper surface of a silica prism (optical index, ni > n2) which form the walls of a plane Couette cell. Two laser beams (wavelength in vacuum Xq) impinge on the prism surface at an incidence angle 0i greater than the critical angle for total internal reflection, 0c = sin (n2/ni). They both... 

Such an angular scan in this attenuated total internal reflection scheme is given in Figure 3(a) and (b), respectively, for the two most commonly used metal layers made from Ag and from Au, respectively. Compared to the reflectivity measured for a bare prism without the metal layer given in Figure 2(c) just as a reference situation, the reflected intensity at angles smaller than the critical angle for total internal reflection, 6c,... 

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