What technology does an x-ray use to see below the surface of a work of art? Laser technology, electromagnetic radiation, color spectrums, computer software

An x-ray uses electromagnetic radiation to see below the surface of a work of art. Specifically, it uses X-rays, which are a type of high-energy electromagnetic radiation. These X-rays can penetrate through materials such as paint layers, reveal hidden features, and provide information about the composition and structure of the artwork. Other technologies like computer software may be used to process and enhance the resulting images, but the primary tool for seeing below the surface is the x-ray radiation itself.