Thanks everyone, this is precisely the sort of discussion I was looking for. Fortunately all I'm taking this quarter is a Goldstein Mechanics course and a Quantum course so I've plenty of time to give this some further thought.
This is really interesting but it's difficult for me to make...
I read the following in Fowles & Cassiday's Mechanics:
"The correct motion that a body takes through space is that which minimizes the time integral of the difference between the kinetic and potential energies"
or
\deltaJ = ∫ L dt = 0...
This question is interesting but I think its as simple as pushing and pulling yourself around on a fixed object in space. Of course you can move because you have a fixed object to push and pull against, regardless of friction, air resistance etc.
Ok, so I had previously determined from the theoretical expression for focused gaussian beam width and the business card image that the laser focused to a width of around 10-20 microns. I set up our CCD so that I could observe N2 fluorescence around 300 nm and measured a width of around 150...
I'm hesitant to send the laser directly at the CCD, even with a filter. Although it seems the most direct route. I'm running about 5 mJ/10 ns so that's a decent amount of power. I just need to get a rough idea of my spot size, I'm attempting to accurately hit the center of a 100 micro m...
Yes the laser is centered at 280.5 nm. The lens is UV quartz and the pulses are ns, should I still need to consider aberration? I think I am going to try to image the waist with a CCD so I can be sure I know what's going on. Never attempted that before, from the side wouldn't you see some N2...
Thanks that looks good.
The laser image visible on a business card before the laser is focused is about 2 mm in diameter, it may be that it spreads out when it hits the business card? Either way I certainly can make a measurement of its visual size when it's nominally collimated.
I need to know the beam width of a pulsed yag laser (280.5 nm) when focused, assuming its completely guassian. The laser is focused through a bi-convex lens with f=15cm. I've found expressions for w(z), but they are all in terms of the minimum waist, w0, which I don't have and is probably the...
I'm trying to understand how the polarization of an incident laser, (280.5 nm YAG in this case horizontally polarized) effects Vibrational Raman Scattering. Consider this laser incident on atmosphereic lab air (I'm seeing N2 and O2 stokes lines shifted to about 300nm) with a CCD lense's line of...
Thanks everyone, I was misinformed and apparently also a little misguided with this. I appreciate your thoughts. Would this be something to talk about on a "statement of purpose" document or simply leave it to a personal comments section on the application itself?
I appreciate your input, somewhat expected a reaction of this nature. I understand what you're saying and realize that I should just put all the cards on the table. However, students do appeal for grade changes after the fact - and I'm sure that my past institution would not have agreed to make...
I realize that this may be far fetched, but I was wondering if anyone knew if this may be a possibility. Consider my situation. I attended Ohio University out of high school for four quarters from fall of 2003 to fall of 2004 when I was dismissed for academic reasons. I rarely went to class...
These are nearly exactly the topics I've covered this quarter, I've never taken quantum, I'm expecting an A. The other students who've taken quantum spend the same amount of time on homework I do. Undergraduate Intro to Solid should be a pretty standard curriculum. The book for your class is...
Well obviously. I've been admitted to the physics masters program at my current university, however, I intend on getting into a Phd program upon completion.
So, will having completed a Masters program in physics make me a better candidate for admittance into a Phd program?