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.
Elektromagnetno zračenje kratke talasne dužine (manje od 100 angstrema, ako vam je pri ruci traka za merenje) koje može da prođe kroz zidove, tela i druge čvrste objekte. Računari ne proizvode Iks zrake.
1. Aparat za dobivanje (snimaka pomoću) Rendgenovih zraka; upotrebljava se naročito u medicini.
2. Merna jedinica za iks- ili gama-zračenje. rendgen (nem.)