Question

11. A slab of specialized acrylic is laid on top of a pane of glass, which is laid on top of another slab of plastic, forming three layers of material as shown in Fig. 1. The indices of refraction are n = 1.75 for the acrylic, n = 1.5 for the glass, and n = 1.3 for the plastic. The boundaries between the acrylic, glass, and plastic are perfectly smooth and parallel. At what angle 0, would a beam of monochromatic red light with a wavelength of 650 nm traveling through the acrylic need to be incident on the glass in order for the light to be totally internally reflected from the boundary between the glass and the plastic? acrylic n = 1.75 n = 1.5 glass n = 1.3 plastic Figure 1: Figure for problem #11. The figure does not necessarily show the corr trajectory (that is what you are supposed to find!)

Answer 1

ha n, sino, a nasina for total internal refpection ng sino ang sinau 22 mg 13 = 0.866 sinoga mga Ts sino, a na sina, b lis x 0.866 sino, = 0.742 oa sin 10.742) 0 = 47.900