Time Scale

A time scale specifies divisions of time.

  • Time standard, a specification of either the rate at which time passes, or points in time, or both
  • Duration (disambiguation), a quantity of time
  • Geological time scale, a scale that divides up the history of Earth into scientifically meaningful periods
  • In astronomy and astrophysics:
    • Dynamical time scale either (in stellar physics) measures the length of time over which changes in one part of a body can be communicated to the rest of that body, or (in celestial mechanics) is a realization of a time-like argument based on a dynamical theory
    • Nuclear time scale, estimates the lifetime of a star based solely on its rate of fuel consumption
    • Thermal time scale, estimates the lifetime of a star once its fuel reserves at its center are used up or if they were to disappear
  • In cosmology and particle physics:
    • Planck time, the time scale beneath which quantum effects are comparable in significance to gravitational effects
  • In mathematics:
    • Time scale calculus, the unification of the theory of difference equations with differential equations
  • In music:
    • rhythm, a temporal pattern of events
    • Time scale (music), divides up music into sections based on the scope

Famous quotes containing the words time and/or scale:

    “As the farmer casts into the ground the finest ears of his grain, the time will come when we too shall hold nothing back, but shall eagerly convert more than we now possess into means and powers, when we shall be willing to sow the sun and the moon for seeds.”
    —Ralph Waldo Emerson (1803–1882)

    “It is in vain that we would circumscribe the power of one half of our race, and that half by far the most important and influential. If they exert it not for good, they will for evil; if they advance not knowledge, they will perpetuate ignorance. Let women stand where they may in the scale of improvement, their position decides that of the race.”
    —Frances Wright (1795–1852)