... If you look in the Links section under Misc. Physics Resources, you will find a link to a website full of physics science fair ideas. I strongly suggest...
... Here's a recipe for measuring the first, second and third ionisation energies of an aluminium atom using the Hall effect - I saw a kid win a science fair...
Just a little more on this: To summarize: what was described was a two slit experiment with a lens added on the far side which presumably was able to focus the...
From: "video_ranger" ... Imagine the usual two-slit set-up. And this unusual screen, to reveal the interference pattern ... _________ _________ _________ ...
Hum... I thought more people who did not know this would google for the answer. As a side note, this question came out when I was taking the Physics GRE eons...
This week's vexer requires that you do some explaining. So try to be as clear as possible, since you still only get one chance at this one. Most metals are...
To be honest, I'm not sure I completely understand the setup. I assume the plates are opaque with photographic film on each side? One thing to consider: it's...
Regarding Cramer's experiment, I basically agree with video_ranger's posts. In my view, the biggest problem is thinking that the detection of a flash at the...
As I posted a while back, I've talked to John Cramer about this Afsar thing personally and offline. Back in February he gave me a copy of the Afshar paper to ...
I just had a crazy thought <not the first time, I know>. If this Afshar paper ever gets published, and if we think we have interpreted it correctly on here, I...
Hi Tom,Scott,Zz,Scerir and all: Sorry, my first message was a little rude (w.r.t.) Cramer. It's possible that some of this may be an argument over definitions ...
Great idea. Let's keep our eyes out for the paper. When (if) it comes out, read it and figure out what the claims really are. Write a collective comment if...
Hey all, I think Zapper's idea is a good one (ginger ale for you, caffeine for me ... ;) ). I'll throw my hat in with everyone here in thinking that ... lens ...
... <video_ranger@y...> wrote: ... Absolutely. The FPI underscores what you (video) just said, since in the FPI, particle paths can zig and zag all over the...
For those who are new here and/or have not heard about this yet, the UN has declared that the year 2005 will be the Year of Physics to celebrate the 100th...
... Not that I understand exactly what they did in the experiment, but it does seem like the light would always be going through both pinholes (as I remember...
We have members from all over the world in here. So this may be of interest to almost everyone. There's a website that publishes many studies and surveys of...
While this vexer isn't the easiest one we've had, I'm still a bit surprised that it stumped a lot of people. ... not. ... both ... What metals have that...
Hopefully, the drawing for this will come out fine, especially if you're viewing it on our Yahoo site. If not, you will find it in the Files section of our...
Not unexpectedly, the sketch is messed up somewhat when viewed on our site. So I recommend you look at the figure uploaded in the Files section under the Vexer...
So first we had a wonderful and successful play "Copenhagen" about the secret meeting between Bohr and Heisenberg during World War II. Then we had Alan Alda in...
... inside ... the ... Can't seem to keep a good hype.... er.... story down, it appears. Paul Ginsparg of Cornell (who, incidentally, was responsible for ...
The last poll on which physicists you have never heard of is rather interesting. If you haven't taken the poll, please do so soon. I have decided to close this...
I hope the awful formatting of the sketch didn't scare anyone from trying the vexer. After all, a very pristine sketch was available on our site. ... If you...
This week's vexer is actually quite simple, but it may pose a challenge (i.e. you may think there's too many unknowns with not enough equations to solve). On a...
... Recall what a "balance" scale looks like. You have two "pans" on a beam balanced on a pivot. Typically, the "arms", which is the beam from the pivot to...
OK, so this is a rather old topic to revive, but I for one is still learning and following it, and I know that straycat at least is still dabbling in it, so...
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