On the electromagnetic spectrum whats after Cosmic Rays?

Question

& can it be detected.

Answer 1

What we call "cosmic rays" are actually heavy particles like atomic nuclei. They are moving extremely fast, for matter, and their velocity is what gives them such high energy, but they are not moving at the speed of light, as the photons of electromagnetic energy are. The short, high-energy photons in the electromagnetic spectrum range from ultraviolet at the lowest energy, through x-rays, and finally gamma rays, with the highest energies being called 'hard' gamma rays.

Answer 2

You're right that secondary cosmic rays are very short wavelength electromagnetic radiation. They're produced when primary cosmic rays from deep space, which are heavy nuclei, hit air molecules in the atmosphere. They.ve got wavelengths of less than 10 -11 metres. As far as I can see, there's no reason why you couldn't have photons with energies as high as 10^9 joules. That would give them a wavelength of around 10^-35 metre, the shortest distance possible.