Ok, so I am not super optimistic that current physics is right about quite a lot...
But there is a strong line of reasoning that light should create some degree of gravity. And as such, then enough light in a small enough space should create a black hole. And if that is so, then higher frequency light that has a smaller wavelength and a higher energy would create a stronger gravity field. Indeed so should a massive particle moving insanely fast. Therefore if you moved fast enough to blue shift high enough energy photons (gamma rays) to the point that they have enough energy to be seen as a relativistic black hole!!!! Therefore super high frequency photons, photons so insanely beyond gamma rays as to be laughable would be black hole rays. Another thought, if this gravity increased by relativistic velocity idea is right on, then moving at super high speed towards an almost black hole (or past one) would cause it to occur for you as a black hole! In much the same way that a charged object would only be seen to have a magnetic field to a moving observer, or apparently. BTW it only takes about twenty something micrograms to make a black hole if compressed into a small enough space. John
