Action
Action describes energy summed up over the time a process lasts (time integral over energy). Its dimension is the same as that of an angular momentum.
- A phototube provides a voltage measurement which permits the calculation of the quantized action (Planck constant) of light. Also see photoelectric effect.
Read more about this topic: Measuring Instrument
Famous quotes containing the word action:
“An action is the perfection and publication of thought. A right action seems to fill the eye, and to be related to all nature.”
—Ralph Waldo Emerson (1803–1882)
“Without our being especially conscious of the transition, the word “parent” has gradually come to be used as much as a verb as a noun. Whereas we formerly thought mainly about “being a parent,” we now find ourselves talking about learning how “to parent.” . . . It suggests that we may now be concentrating on action rather than status, on what we do rather than what or who we are.”
—Bettye M. Caldwell (20th century)
“The world is full of judgment-days, and into every assembly that a man enters, in every action he attempts, he is gauged and stamped.”
—Ralph Waldo Emerson (1803–1882)