Complex sentence: The wavelength of visible light varies between 400-700nm, but the infrared waves (0.7-300um) and ultraviolet waves (10-400nm) can be modelled using the same formalism.
Split into simpler sentences: The wavelength of visible light varies between 400-700nm. Infrared waves (0.7-300μm) and ultraviolet waves (10-400nm) can be modelled using the same formalism.