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:
“If, from the very first, the action of the play is absurd, it is because this is the way mad Waltz—before the play starts—imagines it is going to be....”
—Vladimir Nabokov (1899–1977)
“This nation asks for action, and action now.”
—Franklin D. Roosevelt (1882–1945)
“It is funny that men who are supposed to be scientific cannot get themselves to realise the basic principle of physics, that action and reaction are equal and opposite, that when you persecute people you always rouse them to be strong and stronger.”
—Gertrude Stein (1874–1946)