X-Ray Spectrum: A set of characteristic x-ray frequencies or wavelengths produced by a substance used as a target in an x-ray tube. Each element has a characteristic x-ray spectrum, and there is a strong correlation between atomic number and the frequencies of certain lines in the x-ray spectrum.

 

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X-Ray Spectrum: A set of characteristic x-ray frequencies or wavelengths produced by a substance used as a target in an x-ray tube. Each element has a characteristic x-ray spectrum, and there is a strong co . . . View Full Definition

Spread Spectrum: Initially devised for military use, this radio transmission technology spreads information over greater bandwidth than necessary to resist jamming and other interference.

White Light Spectrum: Is the electromagnetic wavelengths between 400-700 nanometers. Also referred to as the visible spectrum.

Spectrum Cap: A limit to the allocated spectrum designated for a specific service.

X-Ray: A very high energy form of electromagnetic radiation (though not as high energy as gamma rays). X-rays typically have wavelengths from a few picometers up to 20 nanometers. X-rays easily pen . . . View Full Definition

Spectrum Assignment: Federal government authorization for use of specific frequencies or frequency pairs within a given allocation, at specific geographic locations.

Spectrum Allocation: Federal government assignment of a range of frequencies for a category of use or uses. For example, the FCC allocated the 1900 MHz band for personal communications services. Allocation, acco . . . View Full Definition

X-Ray Crystallography: Determination of three dimensional arrangement of atoms in a crystal by analysis of x-ray diffraction patterns.

X-Rays: The portion of the electromagnetic spectrum that has a very short wave length. It has a wave length longer than gamma rays, yet shorter than visible light. X-rays can penetrate various thick . . . View Full Definition

X-Ray Tube: A cathode ray tube that focuses energetic streams of electrons on a metal target, causing the metal to emit x-rays.