For the last installment in a five-part series on great music venues, Rolling Stone polled 26 insiders and musicians â from top managers to Miranda Lambert â and came up with a list of the nation's coolest arenas and stadiums.
The electromagnetic spectrum is a map of all the types of light that we can identify. It separates all the types of light by wavelength because that directly relates to how energetic the wave is. More energetic waves have shorter wavelengths while less energetic waves have longer wavelengths.
Electromagnetic radiation (ER) in this range of wavelengths is called visible light or just simply light. Human eyes can see wavelengths from about 390 to 750 nanometers (billionths of a meter, abbreviated nm). 1 nm = 40 billionths of 1 inch, a very tiny unit of length.