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:
“The highest proof of civility is that the whole public action of the State is directed on securing the greatest good of the greatest number.”
—Ralph Waldo Emerson (1803–1882)
“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)
“The Virgin filled so enormous a space in the life and thought of the time that one stands now helpless before the mass of testimony to her direct action and constant presence in every moment and form of the illusion which men thought they thought their existence.”
—Henry Brooks Adams (1838–1918)