Huygens’ Wavelets

See how light behaves when it meets a surface at an angle in this annotated animation. The laws of reflection and refraction according to the Huygens’ Principle.

With thanks to The Physics Blog.

• Visit this page by Walter Fendt for an applet which allows you to control the variables as well as explaining each step of the animation.
• And for the mathematically inclined, go here to see how Huygens’ Principle has been expanded upon.