# Search results

1. ### Something called wavevector, k

something called "wavevector, k" Dear, I have a question about something called "wavevector, k". What is it? Is that the direction of propagation of light? or something else? Please explain easily. Thank you in advance.
2. ### [Q] Sign of wavefunction in PIB

Ok for the state n=2 in PIB, in the middle of length(x=half lenth) there is a node which means no probability at the point. How do you explain no probability at the point?
3. ### [Q] Sign of wavefunction in PIB

Then, how can you explain the sudden probability change in a node?
4. ### [Q] Sign of wavefunction in PIB

Why do you ask me like that? I'm just curious about what the + and - sign of wavefunction stand for. I know if there is a change of sign, at that point there is a node. But basically I want to know the meaning of the sign.
5. ### [Q] Sign of wavefunction in PIB

If you draw the graph of wavefunction of PIB at any state n, the shape oscillates with - and + signs. What's the significance of it?
6. ### [Q] Sign of wavefunction in PIB

Dear all, I have a question about the sign of Schrodinger equation in particle in a box. What's the meaning of the sign (like -, +) of wavefunction in particle in a box? Can anybody explain that? Thank you.
7. ### Wavepacket vs. wavefunction

Thanks, ice109. What you're saying is that the wavepacket has more or less localized energy at the average position even though the wavepacket is composed of lots of different momenta and for the wavefuction I can consider it like the excited state of paticle in a box. Right? Am I understood?
8. ### Wavepacket vs. wavefunction

Yeah, I did. But I'm not quiet sure about the wavepacket. That's why I asked different subject. Also I think it's different thing.
9. ### Wavepacket vs. wavefunction

Dear, I have a trouble understanding QM. What's the difference between wavepacket and wavefunction? Can we use a wavepacket for a particle in a box? Please reply to this questions. Thank you in advance.
10. ### Why wavepacket?

Thanks again, Ken G. "However, if you look at some incompatible measurement, like position, then an energy eigenstate for a particle in a box is still a "wavepacket" in regard to a subsequent position measurement." From this, you mean I need different kind of wavefunctions for each...
11. ### Why wavepacket?

Thank you for your reply. I understand the reason why we use the wavepacket is there are undefined momenta in a quantum system. So since the wavepacket is composed of different momentum, it can describe the quantum system. Is that your saying, right? Here's the another question. Then, if...
12. ### Why wavepacket?

Dear everyone, I'm wondering about why we need the wavepacket? Is there anyone to clarify my stupidity? Thanks in advance.