REFRACCIÓN

VIDEO: http://www.youtube.com/watch?v=xwzw5GhpC_0&feature=player_embedded#at=244

VIDEO: http://www.youtube.com/watch?v=xwzw5GhpC_0&feature=player_embedded

VIDEO: http://www.youtube.com/watch?v=xwzw5GhpC_0&feature=player_embedded#at=359

APPLET: http://ww2.unime.it/dipart/i_fismed/wbt/ita/RefractionOfLight/lightrefract_ita.htm