The Planck length is a fundamental constant in physics that represents the smallest meaningful length scale in the universe. It is approximately equal to 1.616 × 10^-35 meters. While the Planck length has significant theoretical importance in areas like quantum gravity and string theory, it is not practical to use it as a base unit of measure for everyday lengths for several reasons:
Inaccessibility: The Planck length is incredibly tiny, far beyond the scales that are relevant to our everyday lives. It is much smaller than the size of elementary particles, atoms, or even subatomic particles. It is simply not feasible to measure or work with lengths at such a minute scale using current technologies.
Precision and practicality: The Planck length is at the limit of what can be meaningfully measured in the context of quantum mechanics. It represents the scale at which our current understanding of physics breaks down. Attempting to use it as a base unit would result in measurements that are far beyond our practical capabilities and would introduce unnecessary complexity in everyday calculations.
Compatibility: The existing systems of measurement, such as the International System of Units (SI) or the Imperial system, have been developed and refined over time to suit human-scale measurements and various applications. These systems have proven to be practical, widely adopted, and compatible with the needs of various scientific, engineering, and everyday contexts.
While the Planck length has its place in theoretical physics, using it as a base unit for everyday measurements would not provide any significant benefits and would make practical calculations unnecessarily cumbersome. The current systems of measurement are well-established and continue to serve our needs effectively within their respective domains.