The formula for the phase-velocity for transmission along the ... independent of the direction of propagation of the waves and thus produce relatively different effects for the two directions ...

IT is a well-known fact that the propagation of sound in the atmosphere ... 1) the air probably was stratified either with respect to velocity or to temperature, since the intensity chart shows ...

The phase and the group velocity of light propagating in conventional ... represent a new class of ENZ materials with tunable light propagation properties. In the current issue of Physical Review ...