Mr. Coffee Nerves: My girlfriend will happily assure you I got that beat.
croesius: So how many photons would be sent in a pulse that short?
Gecko Gingrich: croesius: So how many photons would be sent in a pulse that short?The beam of light was approximately 200 hydrogen atoms long./You'd have to know how wide the beam was before you could figure total photos.
Cake Hunter: ... And drove the world's fastest cat nuts trying to catch it.
jjwars1: So what purpose does this serve? DNRTFA. Melting fat cells or something?
Pinner: Wow! I thought when I flick my finger super-fast was pretty fast!
stratagos: RedPhoenix122: Soon.Well, if it makes you feel better the closed beta isn't as awesome as it will be when it goes to open...
ChubbyTiger: Gecko Gingrich: croesius: So how many photons would be sent in a pulse that short?The beam of light was approximately 200 hydrogen atoms long./You'd have to know how wide the beam was before you could figure total photos.That's a pretty small Twinkie.
Flt209er: croesius: So how many photons would be sent in a pulse that short?I can't find the actual journal article anywhere at the moment. When it appears, they should mention the pulse energy and wavelength; photon count is pretty trivial to determine from there. Seeing as they're trying to get the shortest pulse possible though, it wouldn't surprise me if they're getting very low numbers; possibly only single photons at a time. In principal, you can mash as many photons on top of each other as you want, but more power usually ends up smearing the pulse.
Mytch: Most likely they used it to record something of a known speed and used the resulting data to calculate the period.
RedPhoenix122: [www.deviantart.com image 840x900]Soon.
vudukungfu: Nanobots killing cancer. One cell at a time.Lind of like the war on terror.
boozehat: croesius: So how many photons would be sent in a pulse that short?It's a chemical laser but in solid, not gaseous, form. Put simply, in deference to you, croesius, it's like lasing a stick of dynamite. As soon as we apply a field, we couple to a state that is radiatively coupled to the ground state. I figure we can extract at least ten to the twenty-first photons per cubic centimeter which will give one kilojoule per cubic centimeter at 600 nanometers, or, one megajoule per liter.
SumFrequency: Whatever drugs you're taking, stop, because you clearly have no idea what you're talking about. It's an ultrafast Ti:sapphire amplifier taking a femtosecond oscillator seed, stretching it, amplifying it, recompressing it, running it through an optical parametric amplifier to generate Terahertz single-cycle carrier-envelope stabilized pulses, which encounter a nucleus, throw the electron up to a near-Rydberg state because of the electric field gradient, smash it back down through energy levels near the ionization threshold on the way back down the gradient, and throw out high harmonics in the x-ray regime. That's what it takes to get attosecond pulses. Number of photons don't matter, unless you've got an intensity that starts bringing about self-phase modulation, which in the attosecond regime, ain't many. But that's when the really cool stuff starts happening./Build them, know this, kick, etc.....coworker graduated from this professor's lab.
If you like these links, you'll love
Come on, it's $5 a month, just do it.
Sign up for the Fark NotNewsletter!
Links are submitted by members of the Fark community.
When community members submit a link, they also write a custom headline for the story.
Other Farkers comment on the links. This is the number of comments. Click here to read them.
You need to create an account to submit links or post comments.
Click here to submit a link.
Also on Fark
Submit a Link »
Copyright © 1999 - 2018 Fark, Inc | Last updated: Feb 20 2018 09:44:41
Runtime: 0.301 sec (301 ms)