Light Spectrum

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•  Visible light has a range of wavelengths with violet the shortest wavelength and red the longest

The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation

The Sun emits its peak power in the visible region of this spectrum (white light ~ 400 – 700 nm)

Colours are different wavelengths of white light and range from red (~700 nm) to violet (~400 nm)

The colours of the visible spectrum are (from longest to shortest wavelength):

Red    Orange    Yellow    Green    Blue    Indigo    Violet  (Mnemonic:  Roy G. Biv)

The Electromagnetic Spectrum

electromagnetic spectrum