When two streams of photons interact, their behavior depends on the specific circumstances of the interaction. While it is true that photons can exhibit both particle-like and wave-like behavior, the interaction between photons does not typically result in the swirling or mixing behavior analogous to fluids like water.
Photons are bosons, which means they do not possess electric charge and can occupy the same quantum state without any mutual repulsion. This property allows multiple photons to exist in the same space and time, without directly affecting each other.
When two streams of photons intersect, they can superpose and interfere with each other. This interference can result in constructive interference, where the amplitudes of the photons add up and reinforce each other, or destructive interference, where the amplitudes cancel each other out. The resulting interference pattern is determined by the phase relationship between the photons.
In cases where photons of different wavelengths or polarizations interact, their interference can manifest as changes in the intensity or direction of the resulting light. This can be observed in phenomena like diffraction, where light waves spread out and exhibit characteristic patterns when passing through narrow slits or obstacles.
However, it's important to note that photons do not physically mix or merge like fluid particles. Their interactions are described by the principles of quantum electrodynamics, which involve the exchange of virtual particles (such as virtual photons) mediating the forces between charged particles. These interactions are quantified by mathematical equations and probabilities, rather than macroscopic mixing behavior.
So, while photons can exhibit wave-like properties and interfere with each other, their interactions do not resemble the swirling or mixing behavior typically associated with fluids like water.