Recent content by shyguy79

Homework Statement Angular separation of stars 1.5 arcsecs Parallax 0.0050 arcsecs Apparent vis magnitude 2.5 (star a) and 7.5 (star b) The two stars may be in orbit about each other in a binary system, or may be separate stars viewed by chance in almost the same direction in the sky. (i)...

Thats brilliant, thank you!

Thanks ... Looks good what is the code for that?

Is it perhaps that when the quantum number n=4 in the hydrogen atom the eV value ≈ -0.85eV (-13.6ev/4^2)? Because the angular momentum quantum number l = 0 then it has less energy and is closer to the nucleus? I'm kinda clutching at straws

Does anyone know how to do box notation in Latex, I've got this: Li \quad \boxed{\uparrow \downarrow} \quad \boxed{\uparrow\;} \qquad 1s 2s But I want the quantum states to appear underneath their respective boxes?

Homework Statement For potassium in ground state configuration (Z=19) how would you expect the energy of the least tightly bound electron to compare with the energy of the electron in hydrogen excited to a state of the same principal quantum number n. Explain your answer. Homework...

Putting the two together comes out at 1.45μm for the wavelength... Not exactly light? Has something gone wrong here?

This is the actual wording of the assignment: The mass of the particle in the infinite well is 2.00 × 10−30 kg, and the width of the well is 1.00 × 10−9 m. If the particle makes a transition from the third eigenstate to the second eigenstate, what will be the wavelength of the emitted light...

Thanks, just adjusted the well width. When it is asking for the wavelength of the emitted light I'm kinda figuring that since: λ = h/p (the deBroglie wavelength) And p = mv Then I could use the resultant energy released in the equation E = 1/2 mv^2 rearranged for v and then put into...

Homework Statement Explain what happens when a particle transitions from the 3rd eigenstate to the second eigenstate. If the total energy in the 3rd eigenstate is 2.47x10^19J and the energy in the 2nd eigenstate is 1.1x10^-19J calculate the energy released and the wavelength of the emitted...

Thank you.. Just needed a kick in the right direction... Didn't even need to use the value of k.

Schrödinger and Infinite Square Well... hell Homework Statement Show that Schrödinger Equation: \frac{d^{2}\psi(x)}{dx^{2}}+k^{2}\psi(x)=0 has the solution \psi(x)=A\sin(kx) Homework Equations k=\frac{\sqrt{2mE_{tot}-E_{pot}}}{\hbar} The Attempt at a Solution I already know that...

After 5 constants the capacitor would be fully charged? - Yes, practically I think the equation gneill means is i=i_{o}\exp^{(\frac{-t}{\tau})} where t is the time, ... have you seen this? \tau =RC and i_{o} is the time at t=0 - I take it you've seen this before?

Think of the right hand rule for centripetal acceleration... what direction does the hands on a clock go and what is the resultant direction?

You have to remember that i=\frac{\delta q}{\delta t} - so the current as you've put already is the rate of change of charge with respect to time... does this help? Is this all the information that is given in the question?