As a first approximation, I don't see how a wavelength of less than 2 Planck distances could exist. The question is: are there any other limits that would come into play before that?

For example:

• Would the energy density cause the photon to turn into a black hole or something like that?
• Would the energy of the photon exceed the total mass+energy of the universe?

As a first approximation, I don't see how a wavelength of less than 2 Planck distances could exist. The question is: Are there any other limits that would come into play before that?

For example:

• Would the energy density cause the photon to turn into a black hole or something like that?
• Would the energy of the photon exceed the total mass+energy of the universe?