What is visible light? | Live Science

Visible light is a form of electromagnetic radiation (EM), as are radio waves, infrared radiation, ultraviolet radiation, X-rays, and microwaves. In general, visible light is defined as the wavelengths that are visible to the human eye.

Electromagnetic spectrum

Electromagnetic spectrum, from highest to lowest frequency waves.

Electromagnetic spectrum, from the highest frequency wavelength to the lowest frequency. (Image credit: Shutterstock)

Visible light is a type electromagnetic radiation, which is transmitted as waves or particles at different wavelengths and frequencies. This wide range of wavelengths is called the electromagnetic spectrum. That spectrum is usually divided into seven regions in order of decreasing wavelength, increasing energy and frequency. These regions are:

  • radio waves (wavelengths greater than 0.4 inches or 10 mm)
  • microwave (wavelength 0.004 to 0.4 inch, or 0.1 to 10 mm)
  • infrared rays (IR) (wavelength from 0.0003 to 0.004 inches, or 740 nanometers to 100 micrometers)
  • visible light, (wavelength from 0.000015 to 0.0003 inches or 380 to 740 nanometers)
  • ultraviolet (UV) (wavelength from 0.000015 to 0.0003 inches, or 380 to 740 nanometers)
  • X ray (wavelengths from 4 × 10^−7 to 4 × 10^−8 inches, or 100 picometers to 10 nanometers)
  • gamma rays (wavelength less than 4 × 10^−9 inches, or 100 picometers)

https://www.livescience.com/50678-visible-light.html What is visible light? | Live Science

Russell Falcon

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