A vibrational plane is a parallel universe existing in the same physical space as our universe, but separated from us by the vibrational resonances of that universe's particles. There are a potentially infinite number of vibrational planes. Every atom and subatomic particle on a vibrational plane resonates on a mutually interactive frequency. This includes light and sound wavelengths. Particles resonating on a different frequency are repulsed from each other and therefore are incapable of interacting and being mutually perceived in any way.