Are microwaves really just a form of light? What exactly is the electromagnetic spectrum? While our eyes can't see most of this spectrum, except for visible light, we have developed technologies such as giant radio dishes, infrared cameras, x-ray scanners, and ultraviolet satellites to peak into the "invisible" world around us.
NASA’s Universe of Learning materials are based upon work supported by NASA under cooperative agreement award number NNX16AC65A to the Space Telescope Science Institute, working in partnership with Caltech/IPAC, Center for Astrophysics | Harvard & Smithsonian, and NASA Jet Propulsion Laboratory. The award is part of NASA’s Science Activation program, which strives to further enable NASA science experts and content into the learning environment more effectively and efficiently with learners of all ages.