Investigate effect of angle, media
http://www.physicsclassroom.com/Physics-Interactives/Refraction-and-Lenses/Refraction
Investigate effect of angle, media
http://www.physicsclassroom.com/Physics-Interactives/Refraction-and-Lenses/Refraction
Mirrors
Refraction
Images in lenses
Images
Refraction
Images in lenses
Least time
Snell’s Law