gömbhullámfront
A gömbhullámfront, or spherical wavefront, describes the shape of a wave propagating outwards from a point source in three dimensions. Imagine a pebble dropped into a still pond; the ripples spreading outwards are analogous to a spherical wavefront. At any given instant, all points on the surface of the wavefront are at the same phase of the wave, meaning they are experiencing the same part of the wave cycle, whether it's a crest, a trough, or somewhere in between.
As the wave propagates, the radius of the spherical wavefront increases, and its energy spreads over a
Sound waves from a speaker, light from a bare bulb, and seismic waves originating from an earthquake's