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| a form of electromagnetic radiation of shorter wavelength than light and capable of penetrating solids and of ionizing gases |
| the time required for one half the atoms of a given amount of a radioactive substance to disintegrate |
| microwave spectroscopy | |
| —n | |
| a type of spectroscopy in which information is obtained on the structure and chemical bonding of molecules and crystals by measurements of the wavelengths of microwaves emitted or absorbed by the sample | |
| microwave spectroscope | |
| —n | |