X Rays
X rays
X rays are electromagnetic waves with wavelengths covering a fairly broad range from about 3 X 10-8 ft (10-8 m) to 3 X 1011 ft (10-11 m). There is no sharp boundary between x rays and ultraviolet light on the long wavelength side of this range. Similarly, on the short wavelength side, x rays blend into that portion of the electromagnetic spectrum called gamma rays which have even shorter wavelengths. X rays have wavelengths much shorter than visible light, which occurs between 1.2 X 106 and 2.1 X 10-6 ft (4 X 10-7 and 7 X 10-7 m), and they also behave quite differently. They are invisible, are able to penetrate substantial thicknesses of matter, and can ionize matter. Since the time of their discovery in 1895 they have been an extremely important tool in the physical and biological sciences and the fields of medicine and engineering.
Mechanisms for x-ray production
The intensity of x rays from an x-ray tube varies with wavelength. A diagram of the wavelength spectrum from an x-ray tube shows several sharp peaks superimposed on what appears to be a continuous distribution. The peaks and the continuous region are produced by two quite different mechanisms. The continuous spectrum is produced by the incident electrons as they strike and enter the metal target. They are attracted by the positively charged nuclei of the atoms in the target and are suddenly deflected. Electromagnetic theory tells us that when electric charges are accelerated they radiate. Similarly, in the antenna of a radio or TV transmitter, electrons are made to oscillate rapidly back and forth, but in that case the accelerations are not as large and the wavelengths are much larger being measured in meters or centimeters.
A completely different mechanism produces the sharp peaks in the x-ray spectrum. These peaks are at very specific wavelengths and occur at different wavelengths for different targets. This radiation is produced when an incident electron knocks an electron out of one of the inner or low energy levels of the atom. An electron in a higher energy level falls into the vacant level and in the process an x ray is given off. The energy of this x ray is equal to the difference in energy between these two levels. Characteristic x rays have wavelengths ranging from about 1011 m for uranium to 2.5 X 10-8 m for lithium.
… the doctor and the occupational therapist and am currently waiting for an x ray and to see orthopaedic triage. Unfortunately it could be up to two weeks…
…daily dose of alphabetical inspiration. We hope you enjoy it! * WORDS CAN BE LIKE X-RAYS IF YOU USE THEM PROPERLY – THEY’LL GO THROUGH ANYTHING. YOU READ AND YOU’RE…
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… 4.9 times greater if you had a certain type of dental x-ray as a child. The researchers also found that people who had…
They will probably give you a gown to wear during the X-ray process.
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Yes water does block X-rays. How thick the water needs to be depends on the energy of the X-rays
Roughly a normal beam of diagnostic x-rays will be about 80% a
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What is an X-Ray?
Join Dr. Scott Klioze for a look back at the history of Radiology and how modern technology has revolutionized the fields of medicine today. Modern Medicine, only on WDSC! www.wdsctv.org
1940 and X Rays were already in widespread medical and industrial use. This short documentary is presented by one of the inventors of the hot cathode X-Ray tube, William D Coolidge.
X-rays are produced, basically, within an atom as the energy of the electrons in the atom drop to lower energy levels. Use a metal target and an electron gun to create x-rays with help from a science
Grades Pre K & up. Hold these life-sized human x-rays up to the light or use them on a light table and see every authentic detail of a real skeletal s
Hey, kids, it’s time to bone up on the human body! Discover the hidden secrets of the body using real x-rays in the cool new book, Amazing X-Rays: Hum
Grades K – 4. Real x-ray printed on plastic to use with the overhead, windows or light table. Includes 13 species and activity guide to learn about th
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