Friday, September 23, 2011

Great Scott!



By now, you've either heard from me that CERN found faster-than-light particles, heard it from the news, or just not heard about it at all (in which case, don't you dare stop reading). This finding has turned the scientific community for a loop, and no one quite knows how to react. The popular news has been reporting it as the end-all-and-be-all of physics discoveries, but that's not true at all. To be sure, the significance of this find is mind-blowing, but I'm willing to bet that reporters took the ambitions and cautions of scientists (wild things, they are) at face value, instead of looking at the facts. 


You and I know better.* 

Thursday, September 22, 2011

...or is it?

You know that article I just wrote? Hold on to your hats, kids. These neutrinos may have just broken the speed of light. This... is interesting.


http://news.yahoo.com/particles-recorded-moving-faster-light-cern-164441657.html
-----


EDIT: Here's an article about the experiment from a much more... scientifically sound source:


http://news.sciencemag.org/sciencenow/2011/09/neutrinos-travel-faster-than-lig.html

It's All Relative. Really.

In the wonderful world of Physics, everything can be categorized with four adjectives: big, small, fast, slow.

Physics is pretty much like Sesame
Street, in that sense.

Seriously, though, these qualifiers are what physicists focus on when evaluating anything. In fact, there’s a branch of physics for each combination, and unbeknownst to you (or perhaps fully beknownst), we’ve already covered a lot of these concepts ourselves:

Slow and Big:
Classical Physics (The Tides, Gravity)
Slow and Small:
Quantum Mechanics (Quantum Dots)
Fast and Big:
General Relativity (Time Travel)
Fast and Small:
Quantum Field Theory (Higgs Boson)

The fascinating thing is that one man almost single-handedly made all of these possible: Albert Einstein. In 1905, Einstein published a set of papers establishing his ideas on Special Relativity, considered by far the most groundbreaking theory in modern physics. They revolutionized the way scientists thought of the Universe, and made further developments in both science and technology possible. This is all great news, and I’m sure you’re jumping out of your chair with joy, but… what did his papers actually say? What makes Special Relativity so special?


Nope. 

Monday, September 19, 2011

Where We're Going...


A lot of you have probably been thinking, “OK, world, this is the future. Where is my flying car?”

"I need something more... stylish."

Well, before you get your proverbial panties in a bunch, think about how that would work. Without involving jets (which are dangerous for a commercial vehicle) and propellers (which would make your car a plane) the only thing left to make your car fly would be the power of magnetism. Everyone’s pushed a magnet across a table before; in theory, a strong enough magnet would be able to push off a metal surface and, with, a motor in it, possibly drive itself around. However, that magnet you pushed does flips, skids, and is just entirely unstable if pushed from the bottom. How could one implement your fantastic new magnet technology in a stable car, one that wouldn’t flip over when you turned it on? The answer: superconducting levitation. Believe it or not, that is a real phrase, and the technology is being implemented as we speak.

Wednesday, September 14, 2011

The God Particle


The Higgs boson.
...I don't even know.


You may have heard of the “Higgs boson particle” in the news lately. It’s the thing that CERN is working so hard on this year, sending out news reports daily, it seems. In reality, the Higgs boson is one of the only theoretical fundamental particles that hasn’t been observed yet, and even more important, it’s the key to a grand unification of Physics theory.

But... what is it?

Sunday, September 11, 2011

Music makes me...

I’m not sure how many people realize how much physics there actually is in music. In fact, the art of music is a branch of physics all on its own, called musical acoustics. The mathematics applied to this artistic field actually present beautiful and intriguing sounds that one would never think of directly, but at the same time has already intuitively known.

Here’s an example of what I mean. If you play an instrument, you’re already familiar with the major scale: a series of whole notes that make a pleasing sound. In reality, every note in that scale is repeating sound wave, buffeting the medium around it at a certain frequency. This translates into a musical tone when it hits your eardrum. Yet did you ever consider that, by measuring these frequencies, all of these tones can be connected through the wonderful world of numbers?

YES! MATH!

Wednesday, September 7, 2011

The History of the Meter

In science, precise measurements are everything. In order to prove even the simplest theorems, you need systems of measurement that can be both accurate for your purposes, and translatable to other scientists to facilitate collaboration. This is what the SI units are for; they’re a universal system of measuring things. The meter, as stubborn as America might be to use it, is actually the perfect ruler for science (we’ll see why later). But I wondered today: what did the world do before the French intervened with their fancy “Système International d'unités”? How did we measure football fields? 

Yeah, I went there.

Sunday, September 4, 2011

The Fundamentals, Part 4: The Weak (but still really strong) Force

Our final interaction, and it’s a tough one. The weak force is probably the most subtle of the fundamental interactions; it’s responsible for beta decay, or the breaking down of particles like the neutron and proton through radiation. This kind of decay is the main force that powers our Sun, as well as making heavier elements possible. However, there’s a lot more to the weak interaction than meets the eye...