(Solved): In the figure below, a light ray enters a glass slab (whose index of refraction, nglass = 1.625) a ...

In the figure below, a light ray enters a glass slab (whose index of refraction, nglass = 1.625) at point A and then undergoes total internal reflection at point B. Find the initial angle of incidence, 0; in degrees, for which total internal reflection can take place. The medium that surrounds the glass slab is a liquid whose index of refraction, nliquid= 1.185. Please round your answer to one decimal place. Equations: Snell's Law at point A: Snell's Law at point B: glass n liquid nliquid sin = nglass sin 0?. nliquid sin 90º = nglass sin 83 However, 83 = 90° - 0? Therefore, sin 03 = cos 0?