Energy

Energy

1. Mechanical waves

   • mechanical waves need an elastic medium (solid, liquid or gas) to propagate
   • The particles of the medium oscillate around a fixed point, so there is no net transport of matter through the medium.
   • As in the case of a carpet or a whip whose end is shaken, the carpet does not move, however a wave propagates through it
   • Within the mechanical waves we have the:
     • elastic waves
       • An elastic wave is a tensional disturbance that propagates along an elastic medium.
     • the seismic waves
       • Seismic waves are a type of strong elastic wave in the propagation of temporary disturbances of the stress field that generate small movements in the tectonic plates.
     • the sound waves
       • A sound wave is a longitudinal wave that transmits what is associated with sound
     • the gravity waves.
       • Gravity waves are waves generated by the disturbance of a fluid subjected to the force of gravity as a restoring force.

2. Electromagnetic waves

   • las ondas electromagnéticas se propagan por el espacio sin necesidad de un medio pudiendo, por tanto, propagarse en el vacío
   • Electromagnetic waves are produced by the oscillations of an electric field in relation to an associated magnetic field.