x ray radiation exposure

Nuclear Chemistry The branch of chemistry which deals with the study of reactions involving the nuclear changes and their uses is called Nuclear Chemistry. Radioactive Substances The phenomenon of spontaneous emission of active radiations from certain substances is called radioactivity and the substances which e..

It is a phenomenon of physical pollution to all life-supporting system like air, water and land. Radioactivity is spontaneous disintegration of a radioactive substance which results in the emission of radioactive rays. In fact, in this phenomenon, the nuclei of radioactive substances spontaneously disintegrate to emit protons (a-..

GERMICIDAL EFFECT OF ULTRA VIOLET LIGHT ON BACTERIAL GROWTH Most of the bacteria, except photosynthetic bacteria, are damaged by ultraviolet radiation. Although sunrise contains ultraviolet radiations of short to long wavelengths yet it is the short wavelengths that are injurious to the bacteria. The rays..

. 9. X-rays are highly penetrating. They have a harmful effect on the human body. A short exposure of the X-rays to the human body cause reddening of the skin. Long exposure may kill the body tissues. An extract from Roentgen's own research paper goes like this "If the hand is held between the discharge tube..

Exposure tells us about the quantity of radiation falling on a material. The 'absorbed dose' gives the energy absorbed in the material from the incident beam of radiation. The absorbed dose depends on the nature of the incident beam and that of the material. But the exposure depends only on t..

Radiations include a, P y and X rays as well as protons, neutrons and other particles such as mesons ( tc mesons). Because radiation produces ionization, it can cause considerable damage to materials particularly to biological tissues. If the radiation is very intense, metals and oth..

The energy emitted hy a body in the form of radiation by virtue of its temperature is called thermal radiation. This energy is emitted by all bodies above absolute zero and is also called radiant energy. The most powerful source of radiant energy is the Sun. Thermal radiation belongs to the electromagnet..

X-rays were discovered by German scientist Roentgen in 1895. While investigating discharge of electricity through rarefied gases, he observed fluorescence on a screen coated with Barium platino cyanide due to some invisible radiation called X-rays from discharge tube. When highly energetic electrons are ab..

The chief point concerning X-rays that has engaged the attention'of many a scientist and'has finally led to a new conception of radiation is the understanding of their precise nature. Early investigations of the general properties of these invisible rays indicated that they might be of the same nature as vi..

In 1895, Rontgen, a German scientist, experimenting with a discharge tube of high vacuum of the order of 0 01 mm and more, found, to his great surprise, that a fluorescent screen in the neighbourhood of the tube became luminiscen as though exposed to ordinary light. Likewise a photographic plate lying nearby was affected, although it was w..