Fig   P is the polarizing angle (or Brewster’s angle). © 2003 J. F. Becker San Jose State University Physics 52 Heat and Optics

Fig Light striking the water-air interface (a) from the air side ; (b) from the water side. © 2003 J. F. Becker San Jose State University Physics 52 Heat and Optics

Fig Blue sky and red sunset. Scattered light contains mostly blue light (sky) and the white sunlight that has lost some blue appears red (sunset). © 2003 J. F. Becker San Jose State University Physics 52 Heat and Optics

Fig Huygens’ Principle: every point on a wave front may be considered a source of secondary wavelets. © 2003 J. F. Becker San Jose State University Physics 52 Heat and Optics

Fig Reflection © 2003 J. F. Becker San Jose State University Physics 52 Heat and Optics

Fig Refraction © 2003 J. F. Becker San Jose State University Physics 52 Heat and Optics