Biologist with a major in genetics
UNMSM http://luisarbaizaescalante.blogspot.com/
1927
For quantum physics, there is an influence of the observer or sensor in the world microscopic, photons behave as a wave or particle depending on the observer.
In the double-slit experiment of Thomas Young, single photons are fired at a distant screen, partially blocked halfway by a wall containing two slits.
If not checked by which slit a photon passes, it seems to interfere with itself, it behaves like a wave, traveling through both slits:
But if slots are controlled carefully, the interference disappears, and each photon travels through a single slot, as a particle.
This poses two problems: 1 .-
photons can choose how to behave on the basis of measurements?
2.-If any conceivable source was reporting secretly to the photon, must send a message that was traveling faster than the speed of light, something physically inconceivable from the perspective of the theory of relativity. 3.-
since the photons are traveling in the slot and have already traveled a stretch, this change would seem to affect her past that startup Travel (past) and was in a state of wave or particle
1978
Physicist John Wheeler pointed out that a photon could somehow know in advance the type of observation that would be "subject" and change their behavior to wave or particle accordingly. (journey into the future).
To test this possibility, Wheeler then thought of an experiment in which the decision of the mode of observation of photons was taken only after they have already been cast.
2010
Scientific Laboratory and Molecular Quantum Proton (the French CNRS and the Ecole Normal Superieure de Cachan), have been able to carry out the experiment
What was apparent in this experiment is that the photon appears as a wave when it was decided to observe wave behavior and behaves like a particle when has decided to observe a corpuscular behavior.
The trial delayed as much as possible the choice of the photon live experience, hoping that is within the measuring device, in this case an interferometer with a length of 50 meters. Once inside the device, the researchers randomly selected as they would be made, but apparently the photon behaved as if she already knew.
The last change, to adapt to this set.
problems arise 1.-Why do we think the decision to become a wave or particle is prior to the measure?
As Hawking says: Scientists must accept theories that are consistent with experiments, not with our preconceived notions. BIBLIOGRAPHY
Stephen Hawking. Leonard Mlodinow The Grand Design. Critical. 2010 Barcelona
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