Quick question from a complete science ignoramus. The electromagnetic spectrum is described as a continuum, correct? So, given the scales of frequencies that our science is familiar with, The high end would be gamma rays, with frequencies of 300 EHz, the low end being extremely low frequency waves of 3 Hz. Here's my question. What's past gamma rays or ELF waves? Could there be other dimensions in which their particular slice of the EM spectrum lies wholly outside of ours, that exist in the same space as our own?