How are the different light wavelengths classified?
Light consists of certain types of electromagnetic waves. Electromagnetic waves are referred to by different names in accordance with their wavelength, as shown in here "Light" usually refers to electromagnetic waves in the range spanning infrared radiation and ultraviolet radiation, but in some cases, it refers only to visible light. Light with wavelengths in a range of approximately 400 to 800 nm is referred to as "visible light" and is the light that we humans can see with the naked eye. For example, light with a wavelength of 470 nm is blue, light with a wavelength of 540 nm is green, and light with a wavelength of 650 nm is red. Visible light could be described as the kind of light that we humans are familiar with because of our ability to see it.