intensity

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intensity

1. Physics
a. a measure of field strength or of the energy transmitted by radiation
b. (of sound in a specified direction) the average rate of flow of sound energy, usually in watts, for one period through unit area at right angles to the specified direction.
2. Geology a measure of the size of an earthquake based on observation of the effects of the shock at the earth's surface. Specified on the Mercalli scale

intensity

1. (radiant intensity) The radiant flux emitted per unit solid angle by a point source in a given direction. It is measured in watts per steradian.
2. Obsolete name for field strength of a magnetic or electric field.

intensity

[in′ten·səd·ē]
(physics)
The strength or amount of a quantity, as of electric field, current, magnetization, radiation, or radioactivity.
The power transmitted by a light or sound wave across a unit area perpendicular to the wave.
References in classic literature ?
For if, in its perihelion, it should approach within a certain degree of the sun (as by their calculations they have reason to dread) it will receive a degree of heat ten thousand times more intense than that of red hot glowing iron, and in its absence from the sun, carry a blazing tail ten hundred thousand and fourteen miles long, through which, if the earth should pass at the distance of one hundred thousand miles from the nucleus, or main body of the comet, it must in its passage be set on fire, and reduced to ashes: that the sun, daily spending its rays without any nutriment to supply them, will at last be wholly consumed and annihilated; which must be attended with the destruction of this earth, and of all the planets that receive their light from it.
No outlet was observed in any portion of its vast extent, and no torch, or other artificial source of light was discernible; yet a flood of intense rays rolled throughout, and bathed the whole in a ghastly and inappropriate splendour.
Towards two o'clock in the morning, the burning light reappeared, not less intense, about five miles to windward of the Abraham Lincoln.
At last, with intense relief, I saw dimly coming up, a foot to the right of me, a slender loophole in the wall.
I say, in earnest, that I should probably have been able to discover even in that a peculiar sort of enjoyment--the enjoyment, of course, of despair; but in despair there are the most intense enjoyments, especially when one is very acutely conscious of the hopelessness of one's position.
Monsieur Morrel," said Valentine to the young man, who was regarding her with the most intense interest, "my grandfather, M.
Though for once they had ample pasturage, yet the keen winds were so intense that, in the morning, a mule was found frozen to death.
The commander of the first Roman galley must have looked with an intense absorption upon the estuary of the Thames as he turned the beaked prow of his ship to the westward under the brow of the North Foreland.
The next day Aylmer apprised his wife of a plan that he had formed whereby he might have opportunity for the intense thought and constant watchfulness which the proposed operation would require; while Georgiana, likewise, would enjoy the perfect repose essential to its success.
As I endeavored, during the brief minute of my original survey, to form some analysis of the meaning conveyed, there arose confusedly and paradoxically within my mind, the ideas of vast mental power, of caution, of penuriousness, of avarice, of coolness, of malice, of blood thirstiness, of triumph, of merriment, of excessive terror, of intense - of supreme despair.
Blessingbourne pursued, "but I never know, in such intense discussions, what strange impression I may give.
The doctor might have escaped this intense heat by rising into a higher range, but, in order to do so, he would have had to consume a large quantity of water, a thing that had now become impossible.