A   B    C   D   E    F    G   H    I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z  

X-ray

An X-ray (or Rntgen ray) is a form of electromagnetic radiation with a wavelength in the range of 10 to 0.01 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (301015Hz to 301018Hz).