Surface Wave

Surface or ground waves can be of mechanical or electromagnetic nature. In physics, a surface wave is a mechanical wave that propagates along the interface between differing media, usually two fluids with different densities. A surface wave can also be an electromagnetic wave guided by a refractive index gradient. In radio transmission, a ground wave is a surface wave that propagates close to the surface of the Earth.

Read more about Surface Wave:  Mechanical Waves, Electromagnetic Waves

Famous quotes containing the words surface and/or wave:

    Brave men are all vertebrates; they have their softness on the surface and their toughness in the middle.
    Gilbert Keith Chesterton (1874–1936)

    “Speaking of contraries, see how the brook
    In that white wave runs counter to itself.
    It is from that in water we were from
    Long, long before we were from any creature.
    Robert Frost (1874–1963)