- #1
thgiepsluap
- 1
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Hi,
I've been reading about an experiment, where photons are fired through a double slit, and they act as if they go through both slits, by interfering with themselves, and creating an interference pattern on a screen behind.
Then if a measuring device is used to see which slit the photon goes through, it only goes through one, and doesn't create an interference pattern.
Some people suggest that the measuring device physically causes the photon to act this way.
Others suggest that it is the act of observing that does this, and that when a measuring device is left in place, but no-one is observing the results, then the photon still acts as if it goes through both slits.
please can someone help me out, as to what actually happens.
Also, where can i find a 1st hand account of this experiment?
many thanks.
Paul Speight
I've been reading about an experiment, where photons are fired through a double slit, and they act as if they go through both slits, by interfering with themselves, and creating an interference pattern on a screen behind.
Then if a measuring device is used to see which slit the photon goes through, it only goes through one, and doesn't create an interference pattern.
Some people suggest that the measuring device physically causes the photon to act this way.
Others suggest that it is the act of observing that does this, and that when a measuring device is left in place, but no-one is observing the results, then the photon still acts as if it goes through both slits.
please can someone help me out, as to what actually happens.
Also, where can i find a 1st hand account of this experiment?
many thanks.
Paul Speight