Energy in one-dimensional linear waves

C.E. REPETTO; A. ROATTA; R. WELTI

EUROPEAN JOURNAL OF PHYSICS

IOP PUBLISHING LTD

Lugar: Londres; Año: 2011 vol. 32 p. 39 - 42

0143-0807

This work is based on propagation phenomena that conform to the classical wave equation. General expressions of power, the energy conservation equation in continuous media and densities of the kinetic and potential energies are presented. As an example, we study the waves in a string and focused attention on the case of standing waves. The treatment is applicable to introductory science textbooks.