Learn more about why we see rainbows! Drag the hand to change the wavelength of the light, and see how that affects the angle that the light bends when going in and out of the prism. The tools let you look at angles with a virtual protractor.

The measurement tools can be used for applying Snell's law to determine what the index of refraction for the prism. 

This lab was created by Raman Pfaff. Shockwave is being phased out as it is no longer supported in modern browsers.