2. (a) An unpolarized 1064mm laser beam traveling through air is incident upon a YAG (n = 1.82) crystal with an angle of incidence of 61.2". Calculate the fraction of the incident beam transmitted into the crystal. (b) After travelling through the YAG, the beam is incident upon an air interface with an angle of incidence of 28.80. Calculate what fraction of the incident s-polarized light is transmitted through the air/YAG and YAG/air interfaces. What fraction of the incident p- polarized light is transmitted