What determines if an electromagnetic wave emitted from an object is a visible light wave or a wave of infrared radia?

The wavelength of the electromagnetic wave determines whether it is visible light or infrared radiation. Visible light has shorter wavelengths than infrared radiation. The range of wavelengths for visible light is approximately 400-700 nanometers, while infrared radiation has longer wavelengths ranging from 700 nanometers to 1 millimeter.