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European Occupational Health Series : Reports and Studies, European Reports and Studies, Issue 79-In French: Travail Medico-Social et Soins Infirmiers l’Evolution des Besoins

By World Health Organization

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Book Id: WPLBN0000164987
Format Type: PDF eBook
File Size: 4.0 MB
Reproduction Date: 2005

Title: European Occupational Health Series : Reports and Studies, European Reports and Studies, Issue 79-In French: Travail Medico-Social et Soins Infirmiers l’Evolution des Besoins  
Author: World Health Organization
Volume:
Language: English
Subject: Health., Public health, Wellness programs
Collections: Medical Library Collection, World Health Collection
Historic
Publication Date:
Publisher: World Health Organization

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Organization, W. H. (n.d.). European Occupational Health Series : Reports and Studies, European Reports and Studies, Issue 79-In French. Retrieved from http://hawaiilibrary.net/


Description
Medical Reference Publication

Excerpt
In the case of light the radiated energy can best be perceived as electromagnetic waves. In other cases, however, the energy may be described more conveniently as being transported by particles. In the latter instance, an irradiated body may be likened to a target being showered by fast, submicroscopic bullets. An athlete running a 100-m race and a bullet leaving a rifle have about the same kinetic energy. However, their effect on a person whom they happen to hit is quite different! For the athlete, the energy is distributed over several kilograms, and the impact on colliding with another person will also be distributed over many kilograms, with little harmful effect. In contrast, the energy of the bullet is concentrated in a few grams which will strike a small area of the recipient's body, where it will cause considerable harm and perhaps prove lethal for the body as a whole. So, on a smaller scale, will the energy of radiation particles. Their most important action is to rip electrons away from atoms and molecules, leaving them ionized. Radiation that has such an effect, either directly or through secondary particles, is therefore referred to as ionizing radiation. The most common ionizing radiations are X-rays and radiation from radioactive substances. Ultraviolet radiation is a borderline case, while visible light and electromagnetic radiation of longer wavelength (such as infrared radiation, microwaves, and radio waves) are non-ionizing ( 1 , 2 ) .

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