The developer of this quantity worked with Howard Robertson to study a proc
The developer of this quantity worked with Howard Robertson to study a process in which the orbits of small bodies is decayed by radiation pressure; radiation pressure can also be defined by this quantity divided by the speed of light. In a plane wave, this average value of this quantity is equal to irradiance, a definition that relies on the two components being perpendicular to one another. In a similarly named theorem, the divergence of this quantity added to the partial derivative of energy density with respect to time is equal to the negative dot product of current density with electric field. For 10 points, identify this quantity that represents the flux of electromagnetic energy and is equal to the cross product of the electromagnetic field with the magnetic field.
The developer of this quantity worked with Howard Robertson to study a process in which the orbits of small bodies is decayed by radiation pressure; radiation pressure can also be defined by this quantity divided by the speed of light.
{Poynting} vector