Orbs are believed to be spirits in the form of balls of light. They are life forms that travel in groups and are believed to be the human soul or life force of those that once inhabited a physical body here on earth. It is said that they are those spirits that have willingly stayed behind because they feel bound to their previous life or previous location for whatever reason. Spirits are capable of continuing a full existence on the other side with their full mental and emotional facilities intact. They are permitted to visit on occasion and even communicate a message when they have permission to do so. Many believe that we have spirits assigned to watch over us, and that might very well be true but you won’t normally detect them unless they have a special purpose in making their presence known. In other words Spirits seem to have a finer energy that is for the most part undetectable.
The orb is the energy being transferred from a source to the spirit so they can manifest. This may not even be a conscious thing the spirit is doing, just a natural way they get their energy. This would explain why the orbs are round balls. According to the laws of Physics energy being transferring like that would assume is natural shape of a sphere.
What about dust and dirt being stirred up? Can that be the cause of the orbs? All of the shots in a sequence should have the dust or dirt in it. We find that most orb photos do not appear in consecutive photos. All photographers present should get orbs if it is dust being stirred up as well.