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Wavelength of red light - Electrical Diary

What is the wavelength of red light?

The wavelength of red light is a measurement of the distance between consecutive peaks of a light wave. In the electromagnetic spectrum, red light has a wavelength that ranges from approximately 620 nanometers to 750 nanometers. It is one of the longer wavelengths of visible light, which means that it has a lower frequency and lower energy than shorter wavelengths such as violet or blue light. Red light is often used in a variety of applications, including signaling, communication, and lighting. 

Wavelength of Red light In Angstrom

The angstrom (Å) is a unit of length that is equal to 10-10 meters, or one ten-billionth of a meter. It is often used to measure very small distances, such as the sizes of atoms, molecules, and wavelengths of electromagnetic radiation. The angstrom is named after the Swedish physicist Anders Jonas Ångström, who made important contributions to the fields of spectroscopy and astrophysics. While angstrom is still used in scientific literature, it has largely been replaced by the nanometer (nm) as the preferred unit of measurement for wavelengths of electromagnetic radiation. One angstrom is equal to 0.1 nm
1 Å =10-10 meter

Wavelength of All the Colours 

The wavelength of visible light ranges from approximately 3800 Angstrom (violet) to 7400 Angstrom (red). The colors of the visible spectrum, in order of increasing wavelength, are:

  • Violet: 3800-4500 Å
  • Blue: 4500-4850 Å
  • Green: 4850-5700 Å
  • Yellow: 5700-5900 Å
  • Orange: 5900-6200 Å
  • Red: 6200-7400 Å

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