Comments on: Double slit experiment http://www.v13.gr/blog/?p=44 Pseudo-random groups of words that compose what we call knowledge Wed, 27 Mar 2013 21:48:24 +0000 hourly 1 http://wordpress.org/?v=3.5.1 By: v13 http://www.v13.gr/blog/?p=44#comment-5452 v13 Wed, 04 May 2011 20:50:23 +0000 http://www.v13.gr/blog/?p=44#comment-5452 I’m not a physicist so I can’t answer your question and be sure that what I’m saying is correct. I may only claim that from what I infer from the Wikipedia article, this is not a requirement. According to that article (assuming that I read it correctly), the distance F between the gaps is D*λ/B, where D is the distance of the slits with the camera, λ is the wavelength and B is the distance between the slits.

In experiment #2, the two vertical lines have a distance of about 1mm and there are about 10 black lines in this distance. This gives: F=0.1mm, λ=650nm, B=1mm. This means that D=F*B/λ = 10^-4 * 10^-3 / 650 * 10^-9 ~=15cm.

From the setup picture you can see that the distance of the slits and the camera’s CCD is about 6cm. Optical zoom is also involved and I’m not sure how this affects the result.

This train of thought seems to match the results. But it is only a rough approach.

]]> By: x http://www.v13.gr/blog/?p=44#comment-5446 x Tue, 03 May 2011 20:41:37 +0000 http://www.v13.gr/blog/?p=44#comment-5446 I was under the impression that the width of the slits and the distance between them should be of the same order as the wavelength of light being used. Red light is about 650 nm (0.00065 mm), but the width between your slits (at least) is much bigger.

]]> By: Marios Zindilis http://www.v13.gr/blog/?p=44#comment-3105 Marios Zindilis Mon, 15 Nov 2010 13:51:42 +0000 http://www.v13.gr/blog/?p=44#comment-3105 Awesome! Thanks for taking the time to explain this.

]]>