We usually know gravity as the force that keeps solar systems and galaxies together. But how exactly does it work in the microverse?
Gravity-quark-deconfinement - By Foxman (Own work) CC BY-SA 3.0], via Wikimedia Commons
Newtown’s law of universal gravitation states that a particle attracts every other particle in the universe with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers. And we can easily see this law working in space, for example in planets that orbit stars. And we have been also capable of confirming that it works this way in scales around 1 millimeter in size. But now Japanese scientists are going even deeper and measuring gravity at extremely small sizes. Using neutron beamline facility in the Japan Proton Accelerator Research Complex (J-PARC) they started research at a scale of just 0.1 nanometers.
J-PARC (Japan Proton Accelerator Research Complex) Center - Source: WebsEdgeEducation
In the experiment, the researchers fired pulses of neutron beams into a chamber filled with either helium or xenon gas. They were looking for information about how long it takes the neutron to fly through the gas and what the dispersion rate is. Based on the results the team deduced that no unexplainable force is acting on the neutrons. In other words, we can assume that 0.1 nanometers is the lower limit for what gravity works the same way we know it from the macroverse.
The researchers are also convinced that their research will help in finding exotic dimension. If the dimension postulated in the String Theory really exist and gravity is so weak because it “leaks” into those normally hidden dimensions we could theoretically start to see that at nanometer levels.
Sources: