X-ray | engleski leksikon

1. X-ray


Electromagnetic radiation of short wavelength produced when high-speed electrons strike a solid target; Also called: X-radiation, roentgen ray.
Band of electromagnetic radiation in the wavelength range 10-11 to 10-9 m (between gamma rays and ultraviolet radiation; see electromagnetic waves). Applications of X-rays make use of their short wavelength (as in X-ray diffraction) or their penetrating power (as in medical X-rays of internal body tissues). X-rays are dangerous and can cause cancer.
X-rays with short wavelengths pass through most body tissues, although dense areas such as bone prevent their passage, showing up as white areas on X-ray photographs. The X-rays used in radiotherapy have very short wavelengths that penetrate tissues deeply and destroy them.
X-rays were discovered by German experimental physicist Wilhelm Röntgen in 1895 and formerly called roentgen rays. They are produced when high-energy electrons from a heated filament cathode strike the surface of a target (usually made of tungsten) on the face of a massive heat-conducting anode, between which a high alternating voltage (about 100 kV) is applied.

x-ray | engleski leksikon

2. x-ray


1. To examine by taking x-rays.
2. To take an x-ray of something or somebody

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