How is the “Plank Length” the absolute limit of how small something can be?
In: Physics
Planck length is not the absolute limit of how small something can be.
There are many units of measurement. Meters, inches, light years etc.
Speed of light in meters per second is 299792458 m/s. That is not very nice number.
It would be nice if it was “1 some length/some time”.
Enter [Planck units](https://en.wikipedia.org/wiki/Planck_units#List_of_physical_equations).
The Planck units are defined in such way that many useful physical constants are “1” in them.
In planck units the speed of light is 1 planck length/planck time.
This makes math easier.
It does not have any deep “absoulute smallest unit of anything” at all.
Latest Answers