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An X-ray, or, much less commonly, X-radiation, is a penetrating form of high-energy electromagnetic radiation.Most X-rays have a wavelength ranging from 10 picometers to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3 × 10 16 Hz to 3 × 10 19 Hz) and energies in the range 145 eV to 124 keV.

A light ray is a line (straightor curved) that is perpendicularto the light's wavefronts; its tangentis collinearwith the wave vector. Light rays in homogeneous mediaare straight. They bend at the interfacebetween two dissimilar mediaand may be curved in a medium in which the refractive indexchanges.

Radiation, in general, exists throughout nature, such as in light and sound. In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium. [1] [2] This includes: electromagnetic radiation, such as radio waves, microwaves, infrared, visible light, ultraviolet, x-rays ...

Gamma-ray sensors are also used for measuring the fluid levels in water and oil industries. Typically, these use Co-60 or Cs-137 isotopes as the radiation source. In the US, gamma ray detectors are beginning to be used as part of the Container Security Initiative (CSI). These machines are advertised to be able to scan 30 containers per hour.

David Parker Ray (November 6, 1939 – May 28, 2002), also known as the Toy-Box Killer, was an American kidnapper, torturer, serial rapist and suspected serial killer.Though no bodies were found, Ray was accused by his accomplices of killing several women, and was suspected by the police to have murdered as many as sixty women from Arizona and New Mexico while living in Elephant Butte, New ...