A ray diagram showing refraction at the boundary between air and glass Refraction can cause optical illusions as the light waves appear to come from a different position to their actual source.

Refraction is the change in direction of a wave as it travels from one medium to another. For instance, when light travels from air to glass or water waves travel from deep to shallow water.

An explanation of double refraction is followed by Lawrence Bragg demonstrating its effects by means of Polaroid, a crystal of calcite and a lamp incorporating an iris diaphragm. The effects that are ...

Light – Reflection and Refraction, in Class 10 Science. These questions aim to deepen students’ understanding by focusing on ...

Abstract: Ionospheric refraction is one of the factors limiting the accuracy of radar systems tracking objects in or beyond the ionosphere. In advanced systems it may be desirable to perform accurate ...