Electromagnetic force field
The electromagnetic force field is the frequency range of the electromagnetic radiation and their respective wavelengths and photon energies.
The electromagnetic spectrum covers electromagnetic waves whose frequencies range from less than one hertz to more than 1025 Hz, which corresponds to wavelengths ranging from thousands of kilometers to a fraction of the size of an atomic nucleus. This frequency range is divided into distinct bands, and the electromagnetic waves in each frequency band are called by different names; from the low end of the spectrum (long wavelength) are radio waves, microwaves, terahertz waves, infrared, visible light, ultraviolet, X-ray and high frequency gamma rays. The electromagnetic waves in each of these bands have different characteristics, such as how they are produced, how they interact with the material, and their practical applications. The limit for long wavelengths is the size of the universe itself, whereas it is thought that the short wavelength limit is close to Planck's length. High gamma rays, X-rays and ultraviolet radiation are classified as ionizing radiation because their photons have enough energy to ionize ions, causing chemical reactions. Exposure to these rays can be dangerous to health, causing radiation, DNA damage and cancer. Wavelength radiation from visible and lower light is called non-ionizing radiation because it can not cause these effects.