<P> Electromagnetic radiation with a wavelength between 380 nm and 760 nm ( 400 -- 790 terahertz ) is detected by the human eye and perceived as visible light . Other wavelengths , especially near infrared ( longer than 760 nm ) and ultraviolet ( shorter than 380 nm ) are also sometimes referred to as light , especially when the visibility to humans is not relevant . White light is a combination of lights of different wavelengths in the visible spectrum . Passing white light through a prism splits it up into the several colors of light observed in the visible spectrum between 400 nm and 780 nm . </P>
<P> Electromagnetic radiation with a wavelength between 380 nm and 760 nm ( 400 -- 790 terahertz ) is detected by the human eye and perceived as visible light . Other wavelengths , especially near infrared ( longer than 760 nm ) and ultraviolet ( shorter than 380 nm ) are also sometimes referred to as light , especially when the visibility to humans is not relevant . White light is a combination of lights of different wavelengths in the visible spectrum . Passing white light through a prism splits it up into the several colors of light observed in the visible spectrum between 400 nm and 780 nm . </P>
visible light which has a wavelength of between 380 nm and 760 nm is usually
visible light which has a wavelength of between 380 nm and 760 nm is usually
detected by the human eye
detected by the human eye