Visible spectra of LED
The light is electricity radiation At some wave length extend. The wide spectrum of electricity radiation’wave length
-the shortest wave length is universe –rays.Its wave length is only 10-15 metre. The longest wave length is AC electric.Its wave length is up to thousands of kilometer .In this range ,
in about 380nm to 780nm is visible light. the other is invisible. for one,Gamma and X-rays are high-energy invisible light.