videos de óptica

http://www.youtube.com/watch?v=Z-HjwY7yNHY

http://www.youtube.com/watch?v=JBksTVw-R5c

http://www.youtube.com/watch?v=cgI6IpWNR70

http://www.youtube.com/watch?v=PQ1Uq_GcNZU&feature=related

http://www.youtube.com/watch?v=rs7mBQpWQgM&feature=related

http://www.youtube.com/watch?v=y_a91YEhdhA&feature=related