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Aphex_Twin
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Can two objects move towards each other as a consequence of their gravity a distance smaller than one Planck unit of length?
The plank length is a fundamental unit of length in the theory of quantum mechanics. It is believed to be the smallest possible length that can exist in the universe, and is approximately 1.6 x 10^-35 meters.
In the theory of quantum gravity, plank length is considered to be the scale at which the effects of gravity become significant. At this length, the fabric of space-time is believed to be "quantized" or discrete, rather than continuous as described by classical physics.
Due to its incredibly small size, plank length is not currently measurable with our current technology. It is purely a theoretical concept in the field of quantum mechanics.
The concept of plank length challenges our understanding of the universe, as it suggests that there is a limit to how small things can be. It also plays a role in theories of quantum gravity and the search for a unified theory of all the fundamental forces in the universe.
There is a proposed relationship between plank length and the speed of light, known as the Planck length/time. It is believed that at this scale, the speed of light becomes infinite and space-time becomes homogeneous and isotropic, meaning the laws of physics are the same in all directions.