# Talk:Double-slit experiment

Ill try to help if i can...--PalMDtalk 23:00, 8 April 2007 (EDT)

Thanks. --Liπus the Turbogeek(contact me) 22:24, 9 April 2007 (EDT)

## This simple experiment demonstrates that the wave-particle duality of light.

No, it doesn't. The observed patterns are illuminating the wave character of light and if you use only one slit, you see a diffraction pattern, which can't be by particles.

--AugustO 12:06, 6 May 2012 (EDT)

a good point was made on the talk page, but it did not justify wholesale deletion of a parapraph, which can remain with this minor tweak Thanks, but the wholesale deletion is justified. Please get acquainted with the concept of diffraction - it's something happening to waves, and waves only. If you haven't performed the single-slit experiment at school, take a look here.

As for the difference between interference and diffraction, here's what Richard Feynman said in his lectures:

No-one has ever been able to define the difference between interference and diffraction satisfactorily. It is just a question of usage, and there is no specific, important physical difference between them.

Furthermore, I'd appreciate it if we could have our discussion on the talk page, and not in the edit comments. Thanks. --AugustO 17:47, 6 May 2012 (EDT)

When it is only one slit the light behaves more like a particle, though I agree it still retains wave-like characteristics.--Andy Schlafly 17:56, 6 May 2012 (EDT)
So you found an experiment where at the same moment the light shows particle-like and wave-like behavior? That's quite marvelous!
But that is not what happens at a single slit: if a wave front (light, sound, or even surface waves of water) hits a single slit, you observe diffraction. If the slit is quite big, it is just hard to observe. But a large slit doesn't show water waves having particle-like behavior.
--AugustO 18:09, 6 May 2012 (EDT)