X-rays work by passing electromagnetic radiation through the body to create an image on film or on a digital device, thus providing diagnostic imaging. They are a part of the electromagnetic spectrum that includes visibl... More »

www.reference.com Science Physics Optics & Waves

As of 2015, security personnel use two types of X-ray scanners: backscatter scanners, which emit low-energy X-rays that the body's surface reflect, and transmission scanners, which use higher-energy X-rays to reveal obje... More »

www.reference.com Health Diagnostics & Imaging

The x-ray machine was invented in November of 1895 by German physicist Wilhelm Rontgen. X-rays are used extensively for medical imaging of bones, teeth and organs. More »

www.reference.com History Inventions

Ultraviolet radiation, X-rays and gamma rays all have wavelengths that are shorter than visible light. The ultraviolet spectrum ranges from 400 to 10 billionths of a meter, X-rays from about 10 billionths to 10 trilliont... More »

Wilhelm Roentgen invented the use of cathode rays to take X-rays of the body in 1895, according to About.com. Roentgen was honored for his discovery by receiving the Nobel Prize in physics in 1901. More »

www.reference.com Science Physics Optics & Waves

Concave lenses, which are thinner at the center than edges, work by allowing parallel rays of light to pass through, refract and diverge, making the image appear to come from one point. This point is known as the princip... More »

Gamma rays have the shortest wavelength of the electromagnetic spectrum, followed by X-rays and ultraviolet rays. Slightly longer wavelengths of electromagnetic radiation, between 4000 and 7000 angstroms in length, are v... More »