Recent content by phantom113

Does anyone know how to determine the angle at which to place a diffraction grating such that a particular wavelength of light is reflected back along the path of incidence? Do I need to rephrase the question? Any help is much appreciated.

Does anyone know how to determine the angle at which to place a diffraction grating such that a particular wavelength of light is reflected back along the path of incidence? Do I need to rephrase the question? Any help is much appreciated.

1. Homework Statement I'm choosing an angle for a diffraction grating such that a laser of particular wavelength λ is retroreflected (reflected back along incident path). 2. Homework Equations If you have a better way than using the equation below, feel free to explain. The book that I'm...

I'm choosing an angle for a diffraction grating such that a particular wavelength λ is retroreflected (reflected back along incident path). The book that I'm looking through treats the blazed diffraction grating as a set of N slits. This results in the equation...

I don't plan on getting C's in the other classes, more A-/B+ average. That shouldn't be a problem then?

OK, here is perhaps a more concrete question for you all. While my strengths lie in the sciences I am taking about half of my classes in the humanities. It is easier to get a B- or above than in the sciences (you have to try to get a C in the humanities), however, it's also a lot harder (at...

I'm a freshman at Amherst College in my first college physics course (actually an E&M course). I was doing poorly at first (B-/B) but have gotten into the swing of things and am thoroughly enjoying the theory portion of the class(the experiments are also fun but are sometimes tedious). I have...

That was the complete question. I figure there is nowhere for it to go so here is what I am thinking: if the initial charge on the top plate was Q and the initial charge on the bottom plate was -Q then after the charge is added the charge on the top plate is Q+S and that induces a charge of +S...

Homework Statement If you put more charge on one plate of a parallel-plate capacitor than on the other, where does the extra charge go? The Attempt at a Solution Does the extra charge induce the same amount of opposite charge on the near side of the plate and therefore the same amount of...

OK I suppose my real question is, is the electric field at point P 2k(lambda)*(1/R1 + 1/R2) And then if that is so, to find the potential does the integral go from 0 to R1?

Anyone?

Homework Statement Two semicircular rods, one of radius R1 and the other of radius R2 where R2 > R1, are joined by two horizontal, straight rods. The rods carry a charge of lambda coulombs per meter. Calculate the potential at point p at the center of the two semicircles. (P would be the...

Yes very much. Thanks.

Homework Statement Suppose that the electrostatic potential has a minimum at some point. Is this an equilibrium point for a positive charge? For a negative charge? I simply don't understand what the question is asking - what is an equilibrium point? A restatement would be terrific...

Homework Statement A rubber balloon has a charge q evenly distributed over its surface. It is put into a uniform electric field of 120 N/C. What is the charge inside the balloon? Homework Equations The Attempt at a Solution I thought that E inside would be 120 since before it is...