Visible Light

Daniela Hernandez

what is visible light?

Electromagnetic radiation in this range of wavelengths is called visible light or simply light. A typical human eye will respond to wavelengths from about 390 to 700 nm. In terms of frequency, this corresponds to a band in the vicinity of 430–770 THz.

Wavewelength

The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light or simply light. A typical human eye will respond to wavelengths fromabout 390 to 700 nm.

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Frequency Range

Electromagnetic radiation in this range of wavelengths is called visible light or simply light. A typical human eye will respond to wavelengths from about 390 to 700 nm. In terms of frequency, this corresponds to a band in the vicinity of 430–770 THz.

Speed of light in a vacuum

The speed of light in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics. Its precise value is 299792458 metres per second (approximately 3.00×10^8 m/s), since the length of the metre is defined from this constant and the international standard for time.

Key Facts

  • Visible light waves are the only electromagnetic waves we can see
  • We see these waves as the colors of the rainbow
  • Each color has a different wavelength
  • Red has the longest wavelength and violet has the shortest wavelength
  • When all the waves are seen together, they make white light
5 Insane Facts About Light and Color