College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 65

A beam of laser light with wavelength 612 nm is directed through a slab of glass having index of refraction 1.78. (a) For what minimum incident angle would a ray of light undergo total internal reflection (b) If a layer of water is placed over the glass, what is the minimum angle of incidence on the glass water interface that will result in total internal reflection at the water air interface (c) Does the thickness of the water layer or glass affect the result (d) Does the index of refraction of the intervening layer affect the result