human
What is the difference between an infrared and an ultraviolet light?
assistant
An infrared light has a longer wavelength than an ultraviolet light. Infrared light is invisible to the human eye, while ultraviolet light can be seen by the naked eye. Infrared light is used in night vision goggles, which allow soldiers to see at night. Ultraviolet light is used for medical treatments and sterilization, as well as in tanning beds.