XRAYS AND ITS PROPERTIES

XRAYS AND ITS PROPERTIES

· Radiography is an imaging technique using X-rays, gamma rays, or similar ionizing radiation and non-ionizing radiation to view the internal part of the body such as  hard bones,short bones etc. X-ray were discovered by wc roengten  the German physicist in 1895  when he was investigating the conduction of electricity through the gases at low pressure in glass tube.he noticed that the positive electrodes in the tubes gives off invisible rays that cause the fluorescent screen(barium platino cyanide screen kept near the tube) to glow and fogged the photographic plates.the rays were very penetrating,they pass through black paper and even thicker objects.                                                                                          

· The properties of the x-rays are the following:-

 a)the x-rays are electromagnetic rays of shorter wavelength which behave as waves as well as particles     

 b)they have great penetrating power

 c)they travel in straight line with velocity equal to light 

 d)xray affect the photographic film and form the latent image

 e)they liberate minute amounts of heat on passing through matter
 f)they produce other chemicals as well as biological changes mainly by ionization and excitation