What kind of wavelengths do non-ionizing radiation have?

What kind of wavelengths do non-ionizing radiation have?

• A. Larger wavelengths than that of visible light
• B. Shorter wavelengths than visible light
• C. Wavelengths similar to gamma rays
• D. Wavelengths only in the infrared range

Answer: (A)

Non-ionizing radiation consists of photons with energy too low to knock electrons off atoms. Photon energy is inversely related to wavelength, so longer wavelengths carry less energy. Ionization requires enough energy to overcome atomic binding, which comes from shorter-wavelength photons such as ultraviolet and beyond. Therefore, non-ionizing radiation has wavelengths longer than visible light, placing it in regions like infrared, microwaves, and radio waves. That’s why the answer describes larger wavelengths than visible light—the energy per photon is too low to ionize.

Non-ionizing radiation consists of photons with energy too low to knock electrons off atoms. Photon energy is inversely related to wavelength, so longer wavelengths carry less energy. Ionization requires enough energy to overcome atomic binding, which comes from shorter-wavelength photons such as ultraviolet and beyond. Therefore, non-ionizing radiation has wavelengths longer than visible light, placing it in regions like infrared, microwaves, and radio waves. That’s why the answer describes larger wavelengths than visible light—the energy per photon is too low to ionize.