Final answer:
Infrared waves can pass through lenses if the lens material is transparent to infrared radiation. NASA uses infrared radiation to study the universe and it is used in applications like heat lamps and infrared astronomy.
Step-by-step explanation:
Infrared waves can pass through a lens if the lens material is transparent to infrared radiation. Many lenses, such as those used in cameras and telescopes, are made of materials that allow infrared light to pass through. Infrared waves have longer wavelengths than visible light, which allows them to penetrate certain materials more easily.
For example, infrared waves can pass through plastic bags that block visible light. NASA uses infrared radiation to study the universe, as it can penetrate places where visible light is blocked. Infrared waves are also used in applications like heat lamps and infrared astronomy.