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excitation |
Also found in: Dictionary/thesaurus, Medical, Wikipedia, Hutchinson | 0.01 sec. |
excitationAddition of a discrete amount of energy to a system that changes it usually from a state of lowest energy (ground state) to one of higher energy (excited state). For example, in a hydrogen atom, an excitation energy of 10.2 electron volts is required to move the lone electron from its ground state to its first excited state. The excitation energy stored in excited atoms and nuclei is usually emitted as ultraviolet radiation from atoms and as gamma radiation (see gamma ray) from nuclei as they return to their ground states. |
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Under Thought is included every effect which has to be produced by speech, the subdivisions being,-- proof and refutation; the excitation of the feelings, such as pity, fear, anger, and the like; the suggestion of importance or its opposite. The influence that had passed into Clare like an excitation from the sky did not die down. The Knight turned towards the throne, and, sinking his lance, until the point was within a foot of the ground, remained motionless, as if expecting John's commands; while all admired the sudden dexterity with which he instantly reduced his fiery steed from a state of violent emotion and high excitation to the stillness of an equestrian statue, |
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excitation
