<human>: What is the difference between an infrared and an ultraviolet light?
<bot>: An infrared light has a wavelength that is longer than visible light, while an ultraviolet light has a shorter wavelength. Infrared light is invisible to humans but can be seen by some animals such as snakes and insects. Ultraviolet light is not visible to humans or animals, but it can damage our eyes if we look at it too long.