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Weather Glossary - X

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X-rays

The portion of the electromagnetic spectrum that has a very short wave length. It has a wavelength longer than gamma rays, yet shorter than visible light. X-rays can penetrate various thicknesses of all solids, and when absorbed by a gas, can result in ionization.

Xenon

An inert gas that occurs at extremely low concentration in the atmosphere.

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Record-breaking heat wave beginning to scorch western NSW

15:40 EDT Western New South Wales has begun a heat wave and it is likely to become record-breaking in the far west where maximum temperatures should average as much as 40 degrees over seven days.

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