In 1978, a theory called "Wheeler's delayed-choice experiment" was put forward to investigate how the material or the light would move and regulate itself, but at that time it was impossible to realize it.
According to the traditional view, matter acts like a wave or particle independent of our own measurement. Andrew Truscott and Roman Khakimov, two Australian scientists, wanted to solve this problem with their experiment.
In the experiment of two scientists, in the first stage, a group of helium atoms was kept in a condition called the Bose-Einstein condensation, and then the number of atoms was reduced until a single helium atom remained. This atom was then placed between the two laser beams reflected laterally.
When the helium atom was included, the laser beams began to react in a scattered state, as though they were propagating through the grid. Then another laser beam was included to recombine the beams and then the helium atom appeared to follow two different paths at the quantum level. After the second included laser was removed from the system, it was observed that the helium atom was again following a single path.
Truscott has made the following statement about the experiment:
"If we believe that the atom follows a certain path, we must admit that observation at the end of the experiment changed the atom's past. Atoms do not move from A to B. Their wave or particle-like motion becomes real only with the measurements made at the end of their travel."
As a result, when an atom travels, there is only one path or two different paths, which differs according to the measurement result of the experiment. This proves that when you are not observing something that you really believe it exists, it does not actually exist. Truscott explains why this reconnaissance makes everything we know right is questionable: "The experiment proves that our observation tools are everything. At the quantum level, if you are not looking at it, reality does not exist. "
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