释义 |
x-rays [`eks´rāz] PHYSICS A penetrating electromagnetic radiation, usually generated by accelerating electrons to high velocity and suddenly stopping them by collision with a solid body, or by inner-shell transitions of atoms with atomic number greater than 10; their wavelengths range from about 10-5 angstrom to 103 angstroms, the average wavelength used in research being about 1 angstrom. Also known as roentgen rays; x- radiation. |