What are X-rays?
X Rays are part of the electromagnetic spectrum having wavelengths in the range between 0.01 nm to 10 nm. They have a frequency range between 30 PHz to 30 EHz and energies ranging from 100 eV to 100 keV. But the main use of X Rays is because of their property of being able to penetrate through hard and dense structures like the human bones and therefore they are extensively used in the field of healthcare.
The Electromagnetic Spectrum & X-Rays
X Rays were first discovered by a German physicist Wihelm C Roentgen. In a gas discharge tube called the Crooke’s tube, he applied a high voltage to the electrodes (cathode: wire filament and anode: copper), the electrons which were formed at the cathode end would strike the anode with a very high speed. The radiations which were formed at the anode end had extreme penetrating properties. Wilhelm called these radiations X Rays. The X-Ray machines used in hospitals produce radiations in a similar way but using tungsten as the anode and controlling the amount of radiation produced effectively.
Since they have high energies, overexposure to radiation from X Rays can cause tissue damage. This is why applying this kind of radiation, even for medical purposes, comes with a long list of precautions. Pregnant people are advised against using X Rays application to prevent any harm to the fetus.
Types of X -Rays
- Hard X Rays with energies above 5 – 10 keV (in a wavelength range below 0.1 nm)
- Soft X Rays with energies between 100 eV – 5 keV (in a wavelength range between 0.1 nm to 10 nm)
The distinction between Hard X Rays and Gamma Rays are somewhat hazy. They, however, can be identified by their source. Gamma rays are produced from the nucleus of the atom whereas X Rays are produced due to the electrons in the atom.
Stay tuned with BYJU’S to learn more about electromagnetic waves and the electromagnetic spectrum with the help of interactive video lessons.