Thin lenses

This applet illustrates the model of thin lenses. Using a negative focal length will provide a divergent lens. The object position can be manipulated dragging the blue dot labeled as object. This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com

Snell's law

This applet illustrates the Snell's law, also known as law of refraction for obvious reasons. The user can drag the blue dot in order to change the incident angle, and manipulate the two refraction indexes. This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com