Planck length
In physics, the Planck length, denoted ℓP, is a unit of length, equal to1.616199(97)×10−35 metres. It is a base unit in the system of Planck units, developed by physicist Max Planck. The Planck length can be defined from three fundamental physical constants: the speed of light in a vacuum, Planck's constant, and the gravitational constant.
Value of plank
The Planck length 
is defined as
is defined as
where 
is the speed of light in a vacuum, 
is the gravitational constant, and 
is the reduced Planck constant. The two digits enclosed by parentheses are the estimated standard error associated with the reported numerical value.
is the speed of light in a vacuum, is the gravitational constant, and is the reduced Planck constant. The two digits enclosed by parentheses are the estimated standard error associated with the reported numerical value.
The Planck length is about 10−20 times the diameter of a proton, and thus is exceedingly small.
No comments:
Post a Comment