Ionizing radiation is of high energy, capable of penetrating matter, to produce ionization of the atoms, to break chemical bonds and cause harm in living matter. These include X-rays and γ-rays
Non-ionizing radiation is of lower energy, not capable of causing ionization.Non-ionizing radiation ranges from extremely low frequency radiation, shown on the far left through the audible, microwave, and visible portions of the spectrum into the ultraviolet range.