Recent content by mk_gm1

  1. M

    Physics Medical Physics is an exciting field

    What kind of chance would an international student have of getting into a CAMPEP accredited Medical Physics PhD and subsequently into a residency program? Is it similar to medicine, where the likelihood of an international student getting into a US Medical School is basically 0%?
  2. M

    LS coupling for identical electrons

    Ok let me try and clarify what I'm confused by. Have a look at the following table which I have taken from my notes: In this table we are looking at part of the identical (np)2 configuration. There are 15 possible configurations, all of which I haven't posted. Take a look at the 2nd row. I...
  3. M

    How does combining spin result in the total spin angular momentum number?

    Thanks for the reply. I realized I made a really stupid mistake in my maths which I fixed and then it all came out. :rolleyes: With regards to picturing it, I can see why that's useful for a singlet/triplet state when you're dealing with 2 particles. But I don't think I could intuitively look...
  4. M

    How does combining spin result in the total spin angular momentum number?

    Thank you for your reply. I'm afraid I'm having some problems with the maths. Let's take the triplet ^^. Define the spin state, \chi = \uparrow_1 \uparrow_2. S^2 \chi = S_1^2 \chi + S_2^2 \chi + 2 S_1 \cdot S_2 \chi S_1^2 \chi = S_2^2 \chi = \frac{3}{4} \hbar^2 \chi S_{1z} S_{2z} \chi =...
  5. M

    How does combining spin result in the total spin angular momentum number?

    I was wondering if someone could help me to understand how you combine spin to form the total spin angular momentum number, S. Here's a selection from my notes: Now as I understand it, S = (s_1 + s_2), (s_1 + s_2 - 1), ... |s_1 - s_2|. However, I don't really see how that leads to the...
  6. M

    LS coupling for identical electrons

    Let's say I'm considering the 3p^2 electrons. From the Pauli Exclusion Principle, we know that two electrons cannot have the same state, which in this case means ml and ms cannot both be the same for each electron. What this means is that the following 6 terms must not be allowed: m_{l1}...
  7. M

    Integration by substitution ((sin(x))/(1+cos^2(x)))dx

    neutrino's right - you can't differentiate \cos^2{x} as -\sin^2{x}. If it helps, think of \cos^2{x} as cos{x} * cos{x}. You can then use the chain rule.
  8. M

    Solving Exponential Growth Equation without Logarithms

    Do you mean inverse? The inverse of a function basically just means swap x and y around. So y=x^{1/3} goes to x=y^{1/3}...
  9. M

    Formulas for interest Interest

    I never remember the compound interest formula. I just express a 9% increase as 1.09. Then the answer just becomes 5000(1.09^6) I just find this method easier to remember tbh..although it's basically the same thing.
  10. M

    Need Help with Simplifying Expressions on Your Graphing Calculator?

    Both look right to me. I've never owned or used a graphing calculator, so I'm afraid I can't help you with that. But there is a decent program out there called Autograph, that's quite a powerful yet simple-to-use tool. You can download a free 30 day trial of it from their website. I'm not...
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