Visible Light Waves
Waves with a length of between 0.4 and 0.7 micrometers can be detected by the human eye. For this reason we call these waves visible light. As you look around the room, everything you see has these waves bouncing off of them. If they didn’t, you would not be able to see them. What your eyes pick up and turn into a picture in your brain are these visible light waves.
Shorter visible light wavelengths are bluer in color, while longer visible light wavelengths are redder in color. The wavelengths detectible by the human eye represent only about 3% of the total electromagnetic spectrum.