Ionizing radiation – This type of radiation contains enough electromagnetic energy to strip atoms and molecules from the tissue and alter chemical reactions in the body. Gamma rays and X-rays are two forms of ionizing radiation. We know they cause damage, which is why we wear a lead vest when X-rays are taken of our bodies.

Non-ionizing radiation – Non-ionizing radiation is typically safe. It causes some heating effect, but usually not enough to cause any type of long-point in time damage to tissue. Radio-frequency energy, visible light and microwave spreading are considered non-ionizing.