Light Particle Property 光的粒子性質

If light is a beam of particles, how do they stick to each other, and not scattered.

Electricity has circuits, Water has pipes, Those are for them to run and stick together, while Light has nothing.

如果光是一束粒子，它們如何相互粘合，而不是分散。   電有電路，水有管子，那些是為了讓它們運行並粘在一起，而光沒有。