Questions Asked

richyw:
Group Title
How do I normalize this wavefunction? simple integral that I can't do!
 updated 10 months ago
 6 replies
 1 Medal

richyw:
Group Title
Getting lost in this algebra!
 updated 10 months ago
 No Medals Yet

richyw:
Group Title
Show that the twobody hamiltonian\[H_{\text{sys}}=\frac{\mathbf{p}_1^2}{2m_1}+\frac{\mathbf{p}_2^2}{2m_2}+V( \mathbf{r}_1,\mathbf{r}_2)\]ca…
 updated 10 months ago
 1 reply
 1 Medal

richyw:
Group Title
Can someone help me with this power series expansion?
 updated 10 months ago
 15 replies
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richyw:
Group Title
Is it possible to have a probability density with an expectation value of x=0 but where \(P(x<0)\neq P(x>0)\)
 updated 11 months ago
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richyw:
Group Title
Looking for some help with MatLab. Basic question.
I am trying to create a function of time, take its derivative and then plot all three …
 updated 11 months ago
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richyw:
Group Title
trouble with an improper integral. can someone please explain to me how my instructor evaluated this integral?
 updated one year ago
 5 replies
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richyw:
Group Title
Invert these relations
\[\leftS_{n+}\right\rangle=\cos{\frac{\theta}{2}}\leftS_{z+}\right\rangle+\sin{\frac{\theta}{2}}\leftS_{z}\right…
 updated one year ago
 21 replies
 1 Medal

richyw:
Group Title
I'm trying to plot a graph using mathematica.
I would like to make a plot of the first few energy levels for the 1d particle in a box. s…
 updated one year ago
 2 replies
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richyw:
Group Title
how do I solve this improper integral?
\[\int^{\infty}_{\infty}\lambda x^2 e^{2\lambda x}dx\]
 updated one year ago
 2 replies
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richyw:
Group Title
does anyone know what \(d^3x\) is commonly short for?
my assignment says I need to use\[\int d^3x\] in spherical coordinates. is this co…
 updated one year ago
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richyw:
Group Title
Stuck on a basic improper integral
 updated one year ago
 8 replies
 2 Medals

richyw:
Group Title
Spherical to Cartesian transformation
\[f(r,\theta ,\phi )=\frac{C\sin\phi \cos\theta}{r^3}\]
 updated one year ago
 1 reply
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richyw:
Group Title
surface area element.
I am trying to remember how to find the surface area element of one of the faces of this pyramid.
 updated one year ago
 5 replies
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richyw:
Group Title
snell's law problem (lateral displacement of a beam)
I'm trying to find the lateral displacement of a light beam that goes through a piec…
 updated one year ago
 3 replies
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richyw:
Group Title
evaluate an integral around a triangular path.
\[\vec{F}=(x+y)\hat{i}+xy\hat{j}\] I need to evaluate\[\oint \vec{F}\cdot d\vec{l}\] count…
 updated one year ago
 2 replies
 No Medals Yet

richyw:
Group Title
I'm not sure why these are equivalent?
\[\sqrt{bx}{bx}dx=\sqrt{\frac{2k}{m}}dt\]is apparantly the same thing as saying…
 updated one year ago
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richyw:
Group Title
can someone help explain this step to me?
I have …
 updated one year ago
 3 replies
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richyw:
Group Title
Need help with a trigonometric identity.
I have \[E_y=E_{0y}\cos (kz\omega t+\epsilon)\]and my book says that this is equivalent to \[\fr…
 updated one year ago
 5 replies
 1 Medal

richyw:
Group Title
Intensity distribution for double slit experiment.
I am trying to remember how we get the intensity distribution for slits separated by a…
 updated one year ago
 6 replies
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richyw:
Group Title
is there a way to show this identity other than using brute force?
\[\mathbf{A}\cdot(\mathbf{B}\times\mathbf{C})=\left\begin{matrix}A_x&A_…
 updated one year ago
 7 replies
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richyw:
Group Title
maximizing a function that has an integer multiplier in it.
how would I maximize \[f(n)=\frac{1}{4}\frac{1}{2\pi n}\sin\frac{\pi n}{2}\]…
 updated one year ago
 1 reply
 1 Medal

richyw:
Group Title
show that two vectors are perpendicular.
 updated one year ago
 8 replies
 1 Medal

richyw:
Group Title
Help with linear combination
 updated one year ago
 1 reply
 No Medals Yet

richyw:
Group Title
precalc question. How to I work back from a fraction to find its angle?
I have like \[\frac{1+\sqrt{3}}{2\sqrt{2}}\]\[\frac{1+\sqrt{3}}{2\…
 updated one year ago
 30 replies
 4 Medals

richyw:
Group Title
A beam of natural light is incident on an airglass interface \((n_{ti}=1.5)\) at \(40^{\circ}\). Compute the degree of polarization of the …
 updated one year ago
 4 replies
 No Medals Yet

richyw:
Group Title
This is ridiculous but I don't see how to find the between two surfaces.
I'm trying to evaluate the surface integral \[\iint_{\partial S} \…
 updated one year ago
 7 replies
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richyw:
Group Title
Need help working through a limit problem (showing that the limit is zero)
 updated one year ago
 50 replies
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richyw:
Group Title
Can someone familiar with ODE's help me work through this problem?
Consider the system of differential equations in \(\mathbb{R}^3\) given …
 updated one year ago
 12 replies
 1 Medal

richyw:
Group Title
Positive orientation (stokes theorem)
Is it possible to know if I have the proper orientation without really knowing what the surface loo…
 updated one year ago
 No Medals Yet
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