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An evacuated or gas-filled tube in which a current of electrons flows between electrodes.
- ‘For such a large array, an electron tube was chosen instead of a solid-state sensor because the cost per unit area was considerably lower than that of a solid-state detector.’
- ‘Nuclear material is used in products such as electron tubes, self-luminous watches, or radiation measuring instruments for standardization or calibration purposes.’
- ‘A specialized form of the electron tube, the magnetron, is the source of microwave energy in microwave ovens and some radar systems.’
- ‘Electron tubes have been replaced by solid-state devices, such as transistors, for most applications.’
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