Article from website http://www.solarlightaustralia.com.au/
WAVE LENGTH AND COLOUR
Electromagnetic radiation comes in different wavelengths which ranges from radio waves to gamma rays. Electromagnetic radiation is made up of both particles and waves. They can be looked as, changing electric and magnetic fields which propagate through space, forming an electromagnetic wave. The electromagnetic spectrum is the distribution of electromagnetic radiation according to energy or according to the frequency of wavelength.
Click link to continue reading http://www.solarlightaustralia.com.au/2013/02/20/visible-light/