User:Kimchikim

X ray was discovered in 1895 by William Roentgen that is type of electromagnetic radiation with a high frequency of 30 petaherz to 30 exahertz and has a wavelength of 0.01 to 10 nanometers. They are shorter than UV rays and longer than Gamma rays. It is able to pass through the body, and it is used to look through the body whether if there is abnormality in body. It is generated by x ray tube (use high voltage to accelerate the electrons r4elease hot cathode to a high velocity. The high velocity electrons collide with a metal target, the anode, creating x rays). X ray tube: rhenium (5%), tungsten (95%) are produced for medical applications. People use x-ray in the airport for baggage check, so you can see through your luggage to check whether you have illegal goods or dangerous weapons. The medical usage for plain x rays is to detect the skeletal system, as well detecting disease processes in soft tissue. The computer tomography is imaging alternatives for soft tissue.

William Roentgen William Roentgen is a German Physicist who discovered electromagnetic radiation in a wavelength range which is known as X-rays, an achievement that earned him the first Nobel Prize.