Svjetlost - ogledi

https://www.youtube.com/watch?v=WXfy-HqWW7w - Lom svjetlosti: novčić i šalica 
https://www.youtube.com/watch?v=iWtvczrp7Ds - tot. reflaksija
https://www.youtube.com/watch?v=uT-I32hSy4o - prelamanje svjetlosti
https://www.youtube.com/watch?v=0Xtw3Ce4f04 - odbijanje svjetlosti