This quantity names a  phenomenon which can be avoided by noncritical phase matching, its namesake "walk-off.
This quantity names a  phenomenon which can be avoided by noncritical phase matching, its namesake "walk-off." For an infinitely long cylindrical current-carrying wire, this quantity at the surface of the wire is proportional to the current squared divided by the product of the conductivity and the cube of the radius of the wire. In relativity, the Maxwell stress tensor is augmented by adding a fourth row and fourth column, whose elements consist of the Cartesian components of this quantity. The time-average of this quantity divided by the speed of light gives radiation pressure. The negative divergence of this quantity equals the time derivative of the sum of the mechanical and field energy densities. The cross product of the electric and magneticfields gives, for 10 points, what quantity which represents the energy flux density of an electromagnetic field?
This quantity names a  phenomenon which can be avoided by noncritical phase matching, its namesake "walk-off.
Poynting vector