# Recent content by tristan3214

1. ### Change of Basis With Orbital Angular Momentum

Thanks that makes a lot of sense that you would act on an unknown matrix to then equal the eigenvalue times that same unknown matrix. Then we can go and expand it out into a linear combination.
2. ### Change of Basis With Orbital Angular Momentum

Homework Statement We have the initial orbital angular momentum state in the x basis as |l,ml>x=|1,1>x. We are asked to find the column vector in the z-basis that represents the initial orbital angular momentum of the above state. It then says "hint: use an eigenvalue equation". Homework...
3. ### Qualitative: A Uniformly Charged Cylinder

Thanks for the reply.
4. ### Qualitative: A Uniformly Charged Cylinder

Homework Statement This is just a qualitative question that is along side my main lecture with Griffiths EM book. Basically we have a very long cylinder with charge density sigma and radius a along the z axis. This is mostly beside the point and is just to setup the question. The question...
5. ### Estimating Milky Way Absolute Magnitude

Important: All Logs are base 10 and not the natural log. Homework Statement This question is from Foundations of Astrophysics from chapter 19 Suppose the Milky Way consisted of 2.7x10^11 stars, each of solar luminosity MB=4.7. What would be the absolute magnitude of the whole galaxy? To...