When students are first taught about plane waves, most simply recognize the algebraic expression of a plane wave, but most do not understand what is planar about plane waves. This is particularly troubling when students move on to study areas in physics which heavily rely on plane wave approximations, such as optics. This computer visualization activity has students visualizing what is planar about plane waves by choosing a wave vector, $\vec{k}$.
emscalarplanewave.mws (Maple 11 Classic)