Recent content by andonrangelov

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    Sphere is the object that has the minimal area for a fix volume, proof

    Can someone give a proof of the statement: “For fix volume a 3-D objects that has minimal surface area is the sphere” ?
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    Frenet–Serret formulas, what are the possible applications?

    Abel, thanks for your comments. I am interested in those equations because they appear in different physical phenomena like three state quantum system, Lorentz force and many more… Normally there is a contraintuitive solution for those equations and I want to see what will be the result in...
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    Jones vectors and electric field of a wave

    The mirror itself serve as a half-wave plate if your light fall perpendicular to its surface. Light that pass two times through the quarter wave plate serves as a half wave plate.
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    Detecting Circularly Polarized Light with Half-Wave Plates and Polarizers

    No, you need quarter wave plate and a polarizer. This is called circular polarizer (see http://en.wikipedia.org/wiki/Circular_polarizer#Circular_Polarizers)...
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    Combining Quarter-Wave Plates: Effects & Differences

    This is the way to build a zero order wave plate, so you may have a half-wave plate or a zero order quarter wave plate. Zero order wave plate has better properties then the wave plate. Bye the way very good question and very proper time to ask it Aug2-11
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    Understanding the Use of Quarter-Wave Plates for 3D Cinema

    Robphippen very good question I was going to ask the same question, so thank you for asking instead of me …
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    What is the Charge on the metal plate?

    The plate will have the same charge but opposite sign. For more details see the Method of images (for example here http://en.wikipedia.org/wiki/Method_of_images)... Of course this is if you assume that the metal plate is infinity big (the charge is close to the plate surface) Sorry better...
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    Solving Second-Harmonic Generation Phase Mismatch - Exact Solution?

    Nonlinear differential equation can, what are the solutions of this one? Hi all, I am searching for the solutions of the following nonlinear system: idA/dt=B.B.exp(i.s.t) idB/dt=B*.A.exp(-i.s.t) where B(t),A(t),s=constant but B and A are complex (B* means complex conjugation of B...
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    What Are the Physical Applications of Matrices?

    Thank you very much for those examples, but with quantum mechanics I am not familiar. I just want to have more detail example, it can be in optics or other more easy understanding fields then quantum mechanics. For example a link or a good book recommendation will serve best. Thanks again….
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    Solving Second-Harmonic Generation Phase Mismatch - Exact Solution?

    Ok, here is the nonlinear system that I want to solve idA/dt=B.B.exp(i.s.t) idB/dt=B*.A.exp(-i.s.t) where B(t),A(t),s=constant but B and A are complex (B* means complex conjugation of B in the above equation)
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    What Are the Physical Applications of Matrices?

    I start to learn about matrices and their algebra, but I am wondering what physical application they have. I know that matrices have application in optics, which is called “Matrix Optics”, but do they have other applications? Can you give different and real physical examples with matrix algebra...
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    Suspension Bridge Parabola Problem

    SteamKing you are right I haven’t pay enough attention here is the problem set and the solution if someone is interested in it, about the point of the parabola I think the others give good explanation how to find it….
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    Solving Second-Harmonic Generation Phase Mismatch - Exact Solution?

    Well it seems that my question is very difficult …..
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    Invisibility cloak possible? how close are we?

    Here is a new development about the invisibility http://www.kurzweilai.net/physicists-use-natural-crystals-to-develop-invisibility-cloak or if you like you may look directly to the paper http://www.nature.com/ncomms/journal/v2/n2/pdf/ncomms1176.pdf
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    Frenet–Serret formulas, what are the possible applications?

    Does someone know other applications, or where this formulas may appear?
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