Recent content by Alice Jin

Dear, I want to know about a book explaining easily the fundamentals of optics(not geometric). I'm not a student who studys physics or optics but grad student studying laser spectroscopy(single molecule fluorescence spectroscopy). Are there any books matching me? Thank you.

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.

I'm looking for Basic Quantum Optics explaining very easily the concept and fundamental principle. What are you going to recommend? Thanks in advance.

Thank you. Then what's the factor to improve the limited spot I can see in terms of NA or focal lenth?

Dear everyone, I'm wondering what the diffraction limited spot is. When a laser(CW) is used to excite a fluorescent single molecule, the fluorescence from a single molecule is shown in the CCD camera. The size of fluorescence molecule is determined by Airy Disc which comes from diffraction...

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?

Then, how can you explain the sudden probability change in a node?

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.

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?

Dear all, I have a question about the sign of Schrödinger 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.

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?

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.

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.

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...

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...