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Friction

Frictional resistance to the relative motion of two solid objects is usually proportional to the force which presses the surfaces together as well as the roughness of the surfaces. Since it is the ...

http://hyperphysics.phy-astr.gsu.edu/hbase/frict.html#fri

How do gecko lizards unstick themselves as they move across a surface?

Gecko use the Van de Waals force to stick themselves to surfaces but how do they unstick themselves. This article provides the answer.

http://www.scientificamerican.com/article.cfm?id=how-do-gecko-lizards-unst

Imaging Raytracer : Rendering the Quadric Surfaces

With this applet you can generate 6 Quadric Surfaces, and a cylinder, and you can do all that in about a minute

http://www.frontiernet.net/~imaging/raytracing.html

Gaussian Surface

Part of the power of Gauss' law in evaluating electric fields is that it applies to any surface. It is often convenient to construct an imaginary surface called a Gaussian surface to take advantage ...

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/gausur.html#c1

Fabrey-Perot Interferometer

This interferometer makes use of multiple reflections between two closely spaced partially silvered surfaces. Part of the light is transmitted each time the light reaches the second surface, ...