The smallest unit is the Planck Length. Theoretically, it is not that there can be nothing smaller, but for various reasons that have nothing to do with the limits of technology there is nothing that can be known about anything that happens to be smaller. For scale, the number of Planck Lengths in the diameter of a proton is 10 to the twentieth power.
Planck length and Planck time Planck time is the time it would take a photon moving at the speed of light in a vacuum to cross a distance equal to the Planck length. The Planck length is 1.616252 × 10−35 meters, and the Planck time is 5.39121 × 10−44 seconds. Links are provided to the relevant Wikipedia articles.
somewhere around 4*10^184 planck cubes could fit in the obervable universe and those are a lot smaller than electrons. So that number would be somewhere between a googol and this number.
1059 (1E+59), there are 100,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 Planck Lengths in a Yottameter.
Planck's constant describes the ratio between the energy of an electromagnetic wave and the frequency of that wave.
a pico second
The "Planck units" are generally the smallest units used - except for the Planck unit for mass, which is fairly large.
I saw a planck length once. But I don't like to boast about it.
Planck Time Because 5.4*10^-44 seconds
Planck lenght is equal to 1.616252×10−35 meters. 1020 times smaller than the diameter of a proton.
It is the smallest length scientists have discovered. Anything smaller makes "no physical sense"
The smallest unit is the Planck Length. Theoretically, it is not that there can be nothing smaller, but for various reasons that have nothing to do with the limits of technology there is nothing that can be known about anything that happens to be smaller. For scale, the number of Planck Lengths in the diameter of a proton is 10 to the twentieth power.
a femto second is 1000 times smaller 10-15 an atto second is 1000000 times smaller 10-18 According to current thinking, one Planck time = 5.39 * 10-44 seconds is the smallest unit of time that it will ever be possible to measure.
Strings are much, much, much, much smaller than atoms. Strings are expected to be on the order of the Planck length; about 10-35 m. Atoms, in contrast, are on the order of Angstroms, 10-10 m. If strings were expanded to the size of atoms, atoms on this new scale would be many times larger than the solar system.
Max Planck.
It's what we call a "photon". Its energy is the product of its frequency and Planck's Konstant. No smaller bundle of energy can exist at that frequency.
The Planck distance, or Planck length, is 1.6 x 10^-35 meters.