100 Years of Einstein 378
spacerabbits writes "A century after Einstein's miracle year, most people still do not understand exactly what it was he did. The Economist tries to elucidate what AE did in a recent article."
Last yeer I kudn't spel Engineer. Now I are won.
Their you go, Mr. Einstein. (Score:5, Funny)
Another Einstein Far Side (Score:2)
I know this isn't a book review, but... (Score:5, Interesting)
Re:I know this isn't a book review, but... (Score:5, Informative)
Curl oneliner (Score:5, Informative)
curl -f "http://a768.g.akamai.net/5/768/142/3f9e\
9589/1
5ea187bea5786
6fdf0e7ceb61c22186f
08]_mp4_300.mov" -O
The joys of curl | strings
For Those Experiencing Failures (Score:3, Informative)
Re:I know this isn't a book review, but... (Score:2)
Re:I know this isn't a book review, but... (Score:2)
I also appreciated the first chapter of Fabric of the Cosmos, where Greene talks about the drive behind his life's work. It really spoke to me in a personal way.
Re:I know this isn't a book review, but... (Score:2, Informative)
Re:I know this isn't a book review, but... (Score:2)
Re:I know this isn't a book review, but... (Score:2)
Re:I know this isn't a book review, but... (Score:5, Insightful)
> would recommend buying The Elegant Universe by Brian Green. Somehow it found it's way onto my
> Amazon wishlist a few years ago (I don't remember putting it there), and my mom bought it for me for
> xmas. I've read about half of it so far and it's amazing stuff. It's about the (super)string theory,
> which essentially ties together Einstein's theory of relativity and quantum physics. I can feel my
> brain get bigger as I read it.
And I would recommend that you also take what Green says about string theory with a grain of salt. While he's a good scientist, he like all string theorists, tend to paste over the cracks in string theory. There is no experimental evidence to support string theory, at the moment it just isn't science. He also tends to handwave away difficulties with multiple theories. He is clearly biased towards string theory, and at points I'd say unreasonably biased.
Re:I know this isn't a book review, but... (Score:5, Informative)
And you also have to keep in mind that these theories are extremely oversimplified. We do not possess the power or knowledge to understand the equations in their full form. This was very similar to Einstein's field equations when he first discovered them; I have a feeling in time we will start to grasp the ideas better. Witten himeself claimed that some cynics dubbed his new M-theory for "murky theory" since our understanding of it is so primitive.
Re:I know this isn't a book review, but... (Score:2)
Re:I know this isn't a book review, but... (Score:3, Interesting)
The infinities are nothing to do with nature - they are to do with the mathematics that are used to model nature. They result from the
Re:I know this isn't a book review, but... (Score:3, Insightful)
As I understand, no one has though up any predictions based on string 'theory'. Since we have no predictions, we have no experiments. If we have no experiments, we have no falsification. If we have no falsification, we do not have science.
As it stands,
Re:I know this isn't a book review, but... (Score:4, Funny)
For example, in Standard Model you have to make up 19 different shits in your terminology (particle masses and various physical constants) to make it working. String theory requires only one make up shit parameter to make it working (string tension, IIRC.)
Re:I know this isn't a book review, but... (Score:2)
Re:I know this isn't a book review, but... (Score:3, Insightful)
Oh yeah, all we have are theories.
Re:I know this isn't a book review, but... (Score:5, Informative)
But yes, Einstein's later years were spend on trying to develop a GUT/TOE (Grand Unified Theory/Theory of Everything), basically a way to combine the smooth gentle macroscopic world of space-time in relativity and the extremely chaotic unpredictible microscopic view of quantum physics. String theory is the closest thing we have to accomplishing that goal, and with geniuses like Ed Witten [ias.edu] working on it, I think we stand a good chance of actually discovering/creating such a theory given enough time.
I digress, but I have to state... the PBS specials are very useful and well put together. Brian Greene does an excellent job hosting the show. I espcially like the part where they first mention Ed, one string theorist says something like "we all think we're pretty smart, and he [Ed Witten] is so much smarter." It's amazing how much raw intelligence you need to really comprehend the underlying mathematical principles behind string theory.
Re:I know this isn't a book review, but... (Score:2, Insightful)
Re:I know this isn't a book review, but... (Score:2)
One hope is that if strings exist, they would have left impressions behind from the big bang, similiar to the microwave background radiation. If we can find such evidence it would strongly support the theor
Re:I know this isn't a book review, but... (Score:5, Interesting)
Some notables that come to mind are James Clerk Maxwell for his eletromegnetism and electricity, Tullio Levi Civita for his Absolute Differential Calculus, Wolfgang Pauli, Max Born, and many others.
The universe is a very interesting place that still holds many secrets that we try to unlock with invariants, tensor fields on manifolds, experiments with atom smashers, detecting gravity waves, metrics, Jacobians, etc.... but the bottom line is, no matter what we discover or think is out there, there will always be more questions than answers.
Thank you Albert, you have helped open the door to the long question you had with a unified field theory. As with Pauli say himself the solution to a unified field theory is akin to a Titian painting that is still a blank canvas.
Re: (Score:2)
Sorry, but... (Score:2, Informative)
IMHO, it was overproduced drek. It was absolutely the worst NOVA I've ever seen. Dumbed down physics and cutesy graphics and music. I had to turn it off, I just could not take it. Certainly not of the standard I've come to expect from Nova.
I had a string theorist on my Thesis Committee in grad school, and he asked some pretty interesting questions during my Oral Exam. It's a fascinating field, but if you have to dumb it
Re:Sorry, but... (Score:3, Insightful)
Re:Sorry, but... (Score:3, Insightful)
Well if they had gone through a bunch of calculations, I would have gotten nothing out of it and probably wouldn't have spent more than 5 minutes on it. This program was not meant to explain string theory to physicists; it was targeted at people who have a basic knowledge of physics or less. The intention was not to show how the theory was formed but to give an overview of it.
Re:I know this isn't a book review, but... (Score:2)
Everyone put it on their wishlist after
Re:I know this isn't a book review, but... (Score:2)
by Michio Kaku. My brother picked that up and I read it after he finished. It has a lot of information similar to the article, but much more detailed.
Re:I know this isn't a book review, but... (Score:2)
Einstein has one thing to say... (Score:5, Funny)
Relativity In Words of Four Letters or Less (Score:5, Interesting)
In Words of Four Letters or Less
[ 0 ]
So, have a seat. Put your feet up. This may take some time. Can I get you some tea? Earl Grey? You got it.
Okay. How do I want to do this? He did so much. It's hard to just dive in. You know? You pick a spot to go from, but soon you have to back up and and go over this or that item, and you get done with that only to see that you have to back up some more. So if you feel like I'm off to the side of the tale half the time, well, this is why. Just bear with me, and we'll get to the end in good time. Okay?
Okay. Let's see....
[ I ]
Say you woke up one day and your bed was gone. Your room, too. Gone. It's all gone. You wake up in an inky void. Not even a star. Okay, yes, it's a dumb idea, but just go with it. Now say you want to know if you move or not. Are you held fast in one spot? Or do you, say, list off to the left some? What I want to ask you is: Can you find out? Hell no. You can see that, sure. You don't need me to tell you. To move, you have to move to or away from
Now, let's add the bed back. Your bed is with you in the void. But not for long -- it goes away from you. You don't have any way to get it back, so you just let it go. But so now we have a body in the void with you. So does the bed move, or do you move? Or both? Well, you can see as well as I that it can go any way you like. Flip a coin. Who's to say? It's best to just say that you move away from the bed, and that the bed goes away from you. No one can say who's held fast and who isn't.
Now, if I took the bed back but gave you the sun -- just you and the sun in the void, now -- I'll bet you'd say that the sun is so big, next to you, that odds are you move and not the sun. It's easy to move a body like ours, and not so easy to kick a sun to and fro. But that isn't the way to see it. Just like with the bed, no one can say who's held fast.
In a word, you can't find any one true "at rest". Izzy was the one who told us that. Izzy said that you can't tell if you move or are at rest at any time. You can say that you go and all else is at rest, or you can say that you are at rest and all else goes. It all adds up the same both ways. So we all knew that much from way back when.
Aha, but now wait! The sun puts off rays! So: why not look at how fast the rays go past you? From that you'd see how fast you move, yes? For you see, rays move just the same if what puts them off is held fast or not. (Make a note of that, now.) Izzy had no way to know that, back then, but it's true. Rays all move the same. We call how fast that is: c. So, you can see how fast the rays go by you, and how far off that is from c will tell you how fast you move! Hell, you don't even need the sun for that. You can just have a lamp with you -- the one by your bed that you use to read by. You can have that lamp in your hand, and see how fast the rays go by you when you turn it on. The lamp will move with you, but the rays will move at c. You will see the rays move a bit more or less than c, and that will be how fast you move. An open-and-shut case, yes?
Well, and so we went to test this idea out. Hey, you don't need to be in a void to do this test. We move all the time, even as we sit here. We spin, in fact. So they shot some rays off and took note of how fast they went east, and how fast they went west, and so on. Well, what do you know? The rays went just as fast both ways. All ways, in fact. They all went at c, just the same. Not an iota more or less.
To say that we were less than glad to find that out is to be kind. It blew the mind, is more like it. "What is up with that?" we said. And here is when old Al came in.
[ II ]
Old Al, he came out the blue and said, "Not only do rays move at c if what puts them out is held fast or not: they move at
Re:Relativity In Words of Four Letters or Less (Score:5, Funny)
Re:Relativity In Words of Four Letters or Less (Score:2)
This is presumably what every physics student has in mind as the visualisation of SR/GR (as least I have...).
Now I'll show this to friends if they ask me about special/general relativity. I couldn't have said it better!
Note: "Herb" actually refers to Hermann Minkowski. (Score:5, Informative)
http://www.muppetlabs.com/~breadbox/txt/al.html [muppetlabs.com]
Attribution (Score:5, Informative)
Speaking of people understanding (Score:5, Funny)
Re:Speaking of people understanding (Score:2)
Re:Speaking of people understanding (Score:2, Funny)
Re:Speaking of people understanding (Score:5, Funny)
Once one learns the complex mathematical language required to express his ideas, Einstein's theories are the simplest and most obvious of any in physics.
And ummm, how many semesters of college level mathematics must one pass to really understand what he is saying?
Re:Speaking of people understanding (Score:2)
Re:Speaking of people understanding (Score:2)
Don't know, but certainly not as many as back in 1904.
Re:Speaking of people understanding (Score:2)
Re:Speaking of people understanding (Score:3, Informative)
Re:Speaking of people understanding (Score:3, Interesting)
Re:Speaking of people understanding (Score:5, Funny)
Calc I, II & III
Differential Equations
Partial Differential Equations
Abstract Algebra
Higher Algebra I (and maybe II, depending on your school)
Topology I (and maybe II)
Differential Geometry
And then I believe you're ready for Tensor Calculus and rudimentary Gauge Theory.
Now just where is it that they cover this in high school?
Scott
Re:Speaking of people understanding (Score:3, Insightful)
In fact, Feynmann's QED (Quantum ElectroDynamics) doesn't require any tricky math to explain Einstein's more counterintuitive stuff.
Re:Speaking of people understanding (Score:2, Funny)
Fred: Ricky, whatcha doing tonight?
Ricky: I've got elucidate.
Re:Speaking of people understanding (Score:3, Funny)
Re:Speaking of people understanding (Score:3, Insightful)
As a Physics/Comp Sci Major... (Score:3, Interesting)
We need a National Holiday - Physicists Day - On his Birthday!
Re:As a Physics/Comp Sci Major... (Score:2)
I say this not to take anything away from Einstein, because he was truly a genius. In fact, there have been very few individuals as influential and as damn smart as Einstein. Forget Paris Hilton, drool over Einie!
Re:As a Physics/Comp Sci Major... (Score:2)
Re:As a Physics/Comp Sci Major... (Score:2)
Re:As a Physics/Comp Sci Major... (Score:2)
Another good book and thoughts (Score:5, Interesting)
Re:Another good book and thoughts (Score:2)
Re:Another good book and thoughts (Score:3, Informative)
Old relativity joke (Score:5, Funny)
Grandson (who hasn't a clue, but can't admit it): Well, you see, relative to me, you're old, but relative to a sea turtle, you're young...
(Long silence.)
Old Man: So. From this, your Einstein makes a living?
Einstein hated? (Score:4, Interesting)
Any ideas?
Re:Einstein hated? (Score:5, Insightful)
Re:Einstein hated? (Score:2)
Just kidding, but scientists are very passionate about which theories they choose to believe. I can see someone disagreeing to that extent, even with established theories.
Re:Einstein hated? (Score:5, Insightful)
given that Newton said he had seen far only because he stood on the shoulders of giants, Einstein is even more indebted to others before and during his time.
look, i'm not saying that he wasn't a remarkable physicist- when i read some of his papers, i do feel like i'm reading something that's very close to 'god'- so clear, so elegant, so beautiful.
yes, i am a physicist. and yes, i do find myself using Einstein's results. i'm glad when it happens, because i *feel* i'm close to reality.
Re:Einstein hated? (Score:2)
2. There is a general uneasiness in some parts of the engineering community regarding the striking similarities be
Re:Einstein hated? (Score:2)
having taken quantum mechanics courses... (Score:5, Interesting)
...I can certainly appreciate Einstein's sheer genius, particularly when it came to relativity. It was Einstein who postulated that, essentially, absolutely everything was relative. You hear all the examples about going around the sun in a spaceship really fast, or the twins paradox, but it doesn't really just stop there. There are all kinds of weird things that happen when you go really fast; for example, your size changes. If I'm driving my car really really fast (and of course, we're talking close to the speed of light), my vehicle actually becomes shorter. Then as I slow down, it stretches out again. At the beginning of the 20th century, no doubt what a lot of Einstein proposed sounded like sheer madness.
In his later years, though, Einstein became increasingly conservative and very resistant to the idea of uncertainty, formulated by Bohr and Heisenberg. Einstein, from a generation of research before these two scientists, was still a determinist; he believed that you could not only discover both the position and velocity (speed and direction) of a particle, but that if you knew all such properties of all particles, you could accurately predict the state of things far in the future. I became disappointed with Einstein when I learned that, in the late 30s and 40s, even when faced with overwhelming evidence to support the ontic and epistemic uncertainty principles, Einstein tried lots of clever thought experiments to prove them wrong, even though they all relied on knowing more than one mutually incompatible property at once. I think Einstein contributed a lot, but he also made a lot of mistakes later in his life.
Re:having taken quantum mechanics courses... (Score:3, Interesting)
Plus, it's interesting to note that alot of his "mistakes", like the cosmological constant, are gaining support once again with developments derived out of superstring theory like extra dimensions and dark matter/energy.
You're too hard on Einstein! (Score:3, Interesting)
In his time he couldn't KNOW he was right or wrong, he just hoped he was right.
It's only in hindsight can you say, "he also made a lot of mistakes later in his life," but if you were there, then, you would STILL be dwarfed, I think, by his genius. It's only unfortunate that his genius didn't extend to embrace QM, but he honestly thought they were wrong, too.
Re:having taken quantum mechanics courses... (Score:2, Insightful)
Perhaps his adherance to faith led to such views? Uncertainty I can imagine would put a large dent in the concept of an omniscient Lord.
Re:having taken quantum mechanics courses... (Score:2)
First off, Einstein refuted that quote. While he may have been religious, it was apparantly closer to deism than judaism.
Secondly, uncertainty doesn't rule out God -- it gives God a backdoor through which to influence the universe without having to do more than fix the dice. There are some physicissts who become MORE religious, not less, from their studies.
Re:having taken quantum mechanics courses... (Score:2)
Perhaps his adherance to faith led to such views? Uncertainty I can imagine would put a large dent in the concept of an omniscient Lord.
It would? AFAIK, the uncertainty principle only points to our inability to ascertain the location and velocity of sub-atomic particles without affecting one or the other.
so, an omniscient God wouldn't be subject to the same limitations that non-omniscient creatures are. Uncertainty, then, would seem to flow more naturally with a belief in a
Re:having taken quantum mechanics courses... (Score:4, Informative)
"Quantum mechanics is very impressive. But an inner voice tells me that it is not yet the real thing. The theory yields a lot, but it hardly brings us any closer to the secret of the Old One. In any case I am convinced that He doesn't play dice."
-Einstein
I think this is one of the most misunderstood quotes. Einstein is saying that yes, the models we have for understanding QM are incredibly accurate, but he doesn't feel like the models we have derived are 'the answer.' He is saying that just because the best we can do to predict QM events is with a probabalistic model does not mean that God does not know what is going to happen to each subatomic particle.
Also, on a side note, I feel that uncertainty is necessary for there to be a God. QM uncertainty is the physical means to a free will which allows us the ability to accept or reject God.
Re:having taken quantum mechanics courses... (Score:2, Insightful)
Science is all about changing the theory if something comes up in nature that's not properly predicted, so I believe that there is still alot of value in having one of the greatest minds around throw all of his ability at trying to find flaws in quantum mechanics, and utterly failing to do so.
He may not have been right in not believing in the truth of quantum mechanics, but
Re:having taken quantum mechanics courses... (Score:2)
Re:having taken quantum mechanics courses... (Score:2)
what I find interesting about Einstein is he married a radical woman that was as brilliant as himself only to dump her for a more traditional wife later in life.
Radical to traditional in both scientific and private life....odd parallels
even non-geeks appreciate him (Score:2, Funny)
"There are no geniuses [among coaches] in the National Football League. A genius is someone like Norman Einstein."
- ESPN commentator Joe Theismann
Einstein Quotes (Score:5, Interesting)
Strange is our situation here on earth. Each of us comes for a short visit, not knowing why, yet sometimes seeming to divine a purpose. From the standpoint of daily life, however, there is one thing we do know: that man is here for the sake of other men - above all for those upon whose smiles and well-being our own happiness depends.
- Albert Einstein
I cannot imagine a God who rewards and punishes the objects of his creation, whose purposes are modeled after our own - a God, in short, who is but a reflection of human frailty. Neither can I believe that the individual survives the death of his body, although feeble souls harbor such thoughts through fear or ridiculous egotisms.
- Albert Einstein
As far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality.
- Albert Einstein
Make things as simple as possible, but no simpler.
- Albert Einstein
Technological progress is like an axe in the hands of a pathological criminal.
- Albert Einstein
The significant problems we face can not be solved at the same level of thinking we were at when we created them.
- Einstein
It is easier to denature plutonium than to denature the evil spirit of man.
- Albert Einstein
Few people are capable of expressing with equanimity opinions which differ from that of their social environment.
- Albert Einstein
The important thing is not to stop questioning.
- Albert Einstein
Re:Einstein Quotes (Score:2)
Re:Einstein Quotes (Score:2)
General Theory of Relativity in two lines (Score:5, Interesting)
The best definition I've found till date. If you can wrap your head around that, you're in the clear!
Re:General Theory of Relativity in two lines (Score:2)
Not enough space to wrap it though.
Very good, but (Score:2)
Invariance and Statistics (Score:5, Interesting)
Abraham Pais, a physicist who wrote what is generally regarded as the definitive scientific biography of Einstein, said of his subject that there are two things at which he was "better than anyone before or after him; he knew how to invent invariance principles and how to make use of statistical fluctuations."
This is a great one-line summary of what made Einstein an outstanding physicist.
The use of invariance principles is still finding its way slowly into other subjects. Jaynes' work on probability is an excellent example of the power of invariance principles--he derives all of probability theory from a few basic postulates, including the condition that conclusions be invariant under transformations in the path used to reach them.
--Tom
Biblical proportions (Score:3, Funny)
Re:Biblical proportions (Score:2, Funny)
Patent Clerk?!? (Score:5, Funny)
I'm so confused......
Recommended reading.. (Score:5, Informative)
Some highlights from my annus mirabilis.... (Score:4, Funny)
ate a pound of pasta in one sitting
avoided every single episode of Fear Factor
bowled a 150 game
watched the entire Godfather trilogy, pausing only to switch discs
obeyed nearly all traffic laws
finally cleaned out the laundry room
played Civ II for 13 hours straight
washed the car
thats because (Score:3, Insightful)
Don't forget Poincaré (Score:4, Interesting)
http://www.marxists.org/reference/subject/philosop hy/works/fr/poincare.htm [marxists.org]
What he describes in his paper is quite similar to the Special Relativity of Einstein, although he does not explain it as clearly and as completely as Einstein does. But why history keeps him the shadow I'll never understand.
Re:Don't forget Poincaré (Score:3, Insightful)
Re:Don't forget Poincaré (Score:5, Informative)
David Bohm's excellent primer, "Special Relativity" (available in Dover paperback) gives a very good summary of the situation prior to Einstein's 1905 paper. Essentially, every result that Einstein's theory gave (including the famous E = mc**2, which was published by Heaviside in 1892!) had been arrived at previously by Poincare' and others as necessary consequences of a particular dynamical interpretation of Maxwell's electro-magentic theory.
Einstein's revolution was the derivation of the same results via a kinematical restatement of mechanical laws. Dynamics deals with the causes of motion, kinematics with the description of motion. The "old" relativity assumed that there were real forces acting to squeeze matter so that rods got short and clocks ran slow. Einstein's relativity showed that the same results followed immediately from adopting a particular, consistent, description of motion based on two assumptions (the constancy of the speed of light and the invariance of the laws of nature under changes of velocity.)
One of the consequences of Einstein's theory is that when we discovered matter that does not participate in electro-magentic interactions, such as neutrinos, we could confidently treat it using relativistic mechanics. The old relativity, in contrast, only applied to charged particles.
It is a remarkable and still interesting fact that so much of what Einstein explained can be explained by alternative means within the context of Newtonian dynamics, although the explanations are much less general and much harder to understand.
--Tom
Read Einstein himself! (Score:3, Interesting)
Einstein was a marvellous educator and his writing on the subject is way better than almost anybody else (except for Feynmann maybe).
sciscoop too (Score:3, Informative)
GR, Einstein, Grossman, Hilbert and Plagiarism (Score:3, Interesting)
The money quote:
The original paper by Prof. Winterbottom [unr.edu] was published but a rebuttal to that paper by Corry, Renn and Stachel was not [mpiwg-berlin.mpg.de].
Re:elucidate (Score:2)
Re:elucidate (Score:3, Interesting)
Re:elucidate (Score:2)
And I, for one, find it ironic that the word for the fear of long words is hippopotomonstrosesquippedaliophobia [reference.com].
s/ameliorate/alleviate/ (Score:2)
Mythos inside and outside physics... (Score:5, Insightful)
When asked what he would have thought if solar eclipse had not confirmed general relativity, Einstein famously responded something like he "would have been sorry for the dear Lord - the theory is correct!". The general picture people have is that Einstein sat in a room, thought really hard, and figured out how the world was supposed to be without ever needing to go out and LOOK at it. This idea has inspired generations of young physicists to think that the "real" route to truth about the world is mathematical insight. Over the ensuing century, however, this has essentially never been the case - the biggest breakthroughs generally come when an experiment sees something weird (i.e. discovers new particles or behaviors) and a theorist comes up with a mathematical picture that makes all the weird observations fit together. Experiments are still important - it's not just Plato sitting in his cave imagining how the world ought to be. Beautiful mathematical models of fundamental physics very frequently turn out to be experimentally wrong!
Outside of physics, the public image of Einstein has arguably breathed life into the legions of crackpots who think they know the theory of everything, claim that quantum mechanics is "obviously" wrong, etc. Everyone learns in school that Einstein was terrible at mathematics growing up and that he did his best work as a patent clerk, not at a university. Many people are encouraged by this, thinking that the best work comes from "outside the system" and need not involve a thorough understanding of the details of current science.
Unfortunately, this is not true. Einstein was quite good at mathematics (had he been a bit more versed in fancy Reimannian geometry, however, general relativity might have happened faster). He had a Ph.D. from one of the world's most prestigious grad schools. He was working as a patent clerk to pay the bills simply because he hadn't yet gotten a teaching job (they were scarce, and even in later years Einstein never did much teaching).
The point is that he knew his stuff (experimental results and current theory). Too many people think they can walk in off the street with no substantial knowledge of physics or mathematics and give a "common sense" alternative to modern physics that doesn't involve any of the "hard stuff". It usually turns out that their work contradicts some experimental result that they never bothered to learn about. I often see e-mails about such ideas that cite Einstein as an example of how an outsider with no knowledge can change a field. In principle, a gifted outsider with a new insight can change any field. In practice (as Einstein shows), it's good to know what others know first.