What is the wavelength range for ionizing rays?

Ionizing rays, which include ultraviolet (UV) rays, X-rays, and gamma rays, have a wavelength range that is shorter than that of visible light. The classification typically indicates that any radiation with a wavelength of 390 nanometers or less possesses enough energy to ionize atoms and molecules, leading to chemical changes and biological effects.

This ability to ionize atoms becomes crucial in fields such as medicine and radiation protection, as ionizing radiation can damage living tissues and DNA, potentially leading to mutations and cancer. Therefore, the range specified in the correct answer relates directly to the definition of ionizing radiation: wavelengths that provide sufficient energy to dislodge electrons from atoms.

Other options fall within the spectrum of non-ionizing radiation, such as visible light (400nm to 700nm), which does not possess enough energy to ionize atoms. This highlights the significance of understanding these distinct ranges when discussing the effects and applications of different types of electromagnetic radiation.