Hey hey, miss.strw!
I'm no expert by anyone's metric, but this is how I like to think of wavelengths/energy:
The shorter the wavelength, the more harmful the energy generated by that particle is. Think of the electromagnetic spectrum headed *right*, or shorter in wavelength, from the visible wavelengths. We're often told to stay out of the sun to avoid harmful UV rays, X-ray guns can in science fiction kill you (and in reality, you have to wear that protective lead vest when getting x-rays), and gamma rays, which have the shortest wavelength, are darn near uncontainable by anything, their energy is so high. Technology to harness gamma rays is relatively very, very new.
In short, the SHORTER it is, the more of a punch it packs - the higher its energy.
Hope this helps in the future.