Like the tailored fit, the modern fit also falls between a slim-fit and a traditional-fit dress shirt. An increasingly common term, vintage fit refers to a shirt that has the slim-cut shirt's narrow waist and smaller armholes but with a standard yoke.
The wave equation for a plane electric wave traveling in the x direction in space is. with the same form applying to the magnetic field wave in a plane perpendicular the electric field. Both the electric field and the magnetic field are perpendicular to the direction of travel x.
Mechanical waves transport energy. This energy propagates in the same direction as the wave. Any kind of wave (mechanical or electromagnetic) has a certain energy. Mechanical waves can be produced only in media which possess elasticity and inertia. A mechanical wave requires an initial energy input. Once this initial energy is added, the wave travels through the medium until all its energy is transferred. In contrast, electromagnetic waves require no medium, but can still travel through one.