When we open the nozzle of the tap slowly, we observe a fine near-transparent beam of water particles coming down smoothly. If we loosen the nozzle a bit more, rotational effects start to appear, which are more prominently visible at high velocities. Moreover, at high velocities, the water coming out appears completely opaque.
Can someone explain to me why this is so? Is this the effects of turbulence, or just unsteady flow? How does this happen?