  We find that the energy-dynamic tensor of electromagnetic wave in medium
defined by Lagrange density is very similar to that of ordinary fluid, and
density and pressure can be defined similarly. The pressure here is different
from the traditional light pressure. On this basis, we discuss the average
momentum, pressure and Bernoulli effect of electromagnetic wave. After
considering the contribution of the interaction term, we obtain a new conserved
energy-momentum tensor, from which Minkowski momentum and Abraham momentum are
derived simultaneously. The difference between them is whether the contribution
of pressure is included in momentum. When the pressure significantly affects
the experimental results, the experiment will support Minkowski momentum. On
the contrary, Abraham momentum is supported. The findings of this paper provide
a new solution to the Abraham-Minkowski Dilemma.
