Lighting technology

Basic knowledge of lighting technology

I. Visible light

Light is radiant energy that travels as an electromagnetic wave. The wavelength range of electromagnetic wave radiation is very wide, only the wavelength of 380 ~ 760nm in this part of the radiation can cause light vision, called visible light. Light with wavelengths shorter than 380nm is ultraviolet, X-ray, γ-ray; Light longer than 760nm is infrared, radio waves and so on, they do not produce light vision to the human eye, that is, can not see. Therefore, light is an objective existence of energy, and has a close connection with people's subjective feelings.