For 10 points, name this type of electromagnetic radiation that is frequently used for medical imaging.
The Chandra space telescope observes this type of radiation. The angles at which this type of radiation causes diffraction when it hits a crystal are described by Bragg's law. This type of radiation has wavelength longer than (*) gamma rays, but shorter than UV rays. When experimenting with cathode ray tubes, Wilhelm Rontgen discovered this type of radiation. For 10 points, name this type of electromagnetic radiation that is frequently used for medical imaging.
The Chandra space telescope observes this type of radiation.
X rays (accept Rontgen rays before "Rontgen")