Infrared ( IR) is an invisible radiant energy, electromagnetic radiation with longer wavelengths than those of visible light, extending from.Infrared ( IR) is an invisible radiant energy, electromagnetic radiation with longer wavelengths than those of visible light, extending from.Rays Power Infra, a leading Solar Energy Company in Delhi India, is one of the few companies that is generating green energy for future.This lesson will explain what infrared radiation is and discuss a number of practical uses and effects of infrared, including its connection.