Planck time

(redirected from Planck interval)

Planck time

A time equal to 5.4 × 10–44 second, and defined as √(hG /2πc 5); h is the Planck constant, G the gravitational constant, and c the speed of light. The uncertainty principle of quantum mechanics prevents any speculation on times shorter than the Planck time after the Big Bang.

Planck time

[′pläŋk ‚tīm]
(physics)
The constant (Gh /2π c 5)1/2with dimensions of “time” formed from Planck's constant h, the gravitational constant G, and the speed of light c ; approximately 10-43 second.