Works Well – Refractive Review

This app includes a catalog of materials divided into gases, liquids, and solids. Clicking one gives you info about it and let's you select it for use as the incident or emergent material. Then go to the refraction tab to view a refraction simulation for the materials you've selected. You can change the frequency of light and the incident angle has a draggable handle so you can sweep through various positions and watch how the emergent angle varies in response.
Review by SpaceLana on Refractive.