The Planck Length

The Planck length is a unit of length that is derived from fundamental physical constants. It is defined as the length at which quantum effects become significant, and is approximately equal to 1.6 x 10^-35 meters, or about 10^-20 times smaller than an atomic nucleus. This length scale is named after Max Planck, the physicist who first described the relationship between energy and frequency in the quantum theory of electromagnetism.

In addition to the Planck length, there are also the Planck time and Planck mass, which are similarly derived from fundamental physical constants and represent the smallest unit of time and mass, respectively, at which quantum effects become significant. These units of measurement are often used as a reference point in discussions of the nature of space, time, and matter at the smallest scales.

The Planck Time

The Planck time is a unit of time that is derived from fundamental physical constants and is approximately equal to 5.4 x 10^-44 seconds. It represents the smallest unit of time at which quantum effects become significant, and is often used as a reference point in discussions of the nature of time and matter at the smallest scales.

The Planck Mass

The Planck mass is a unit of mass that is derived from fundamental physical constants and is approximately equal to 2.2 x 10^-8 kilograms. It represents the smallest unit of mass at which quantum effects become significant, and is often used as a reference point in discussions of the nature of matter at the smallest scales.

 

The address of this page is

http://sonicpathfinder.org/U3A/Cosmology/Planck.html