n=\frac{v_{1}}{v_{2}}\) In the equation above: \(n\) is the refractive index of the material \(v_{1}\) is the speed of light in a vacuum \(v_{2}\) is the speed of light in a material The bigger ...

The direction of the ray may also change. This property of waves is called refraction and commonly occurs with light rays. A normal is a dotted line drawn perpendicular to the surface of the ...