In 1975, the zoologist Arie Schuijf proposed a model 5 suggesting that fish can localize the direction of a sound source by comparing the associated particle-motion and pressure components of a sound.

The particles are either all energy or have mass depending on the direction of their movement along the material's 'tracks'." It's a notable moment in physics, including for those who first ...

The direction of motion. The left hand rule. Use Fleming’s left-hand rule to remember the direction of motion in an electric motor. It is shown in the following diagram.