A ray of light coming from the top left strikes the boundary surface of two media. (It is possible to choose the substances in both lists.) The medium which has the bigger index of refraction is painted blue, the other yellow. You can vary the incident ray with pressed mouse button. The applet will show the reflected and the refracted ray and calculate the corresponding angles:
Remark: The index of refraction varies slightly for different wavelengths. This phenomenon is called dispersion.
© Walter Fendt, December 20, 1997
Translation: НГТУ 2010
Last modification: November 12, 2012