Up to 1956 it was believed that the laws of physics obeyed each of three separate symmetries called C, P, and T. The symmetry C means that the laws are the same for particles and antiparticles. The symmetry P means that the laws are the same for any situation and its mirror image (the mirror image of a particle spinning in a right-handed direction is one spinning in a left-handed direction). The symmetry T means that if you reverse the direction of motion of all particles and antiparticles, the system should go back to what it was at earlier times; in other words, the laws are the same in the forward and backward directions of time.
Invest in physics -- own a piece of Dirac!
At his "World of Physics" Web site, Eric W. Weisstein notes that the fine structure constant continues to fascinate numerologists, who have claimed that connections exist between alpha, the Cheops pyramid, and Stonehenge!
One of the greatest pains to human nature is the pain of a new idea. [ Physics and Politics.]
Metaphysics, with which physics cannot dispense, is that wisdom of thought which was before all physics, lives with it, and will endure after it.= _Goethe._ [Greek: Mete diken dikases, prin amphoin mythou akouses]--Don't pronounce sentence till you have heard the story of both parties.
[Louis Kelso] could be to 21st Century capitalistic economics what Einstein was to 20th Century physics. [ Sunday Magazine , May 17, 1970.]
Peace is never long preserved by weight of metal or by an armament race. Peace can be made tranquil and secure only by understanding and agreement fortified by sanctions. We must embrace international cooperation or international disintegration. Science has taught us how to put the atom to work. But to make it work for good instead of for evil lies in the domain dealing with the principles of human dignity. We are now facing a problem more of ethics than of physics.
"Consider a spherical bear, in simple harmonic motion..."
The external world of physics has … become a world of shadows. In removing our illusions we have removed the substance, for indeed we have seen that substance is one of the greatest of our illusions. … The sparsely spread nuclei of electric force become a tangible solid; their restless agitation becomes the warmth of summer; the octave of aethereal vibrations becomes a gorgeous rainbow. Nor does the alchemy stop here. In the transmuted world new significances arise which are scarcely to be traced in the world of symbols; so that it becomes a world of beauty and purpose — and, alas, suffering and evil. The frank realisation that physical science is concerned with a world of shadows is one of the most significant of recent advances.
All science is either physics or stamp collecting.
All this is mere justice to Goethe; but, as it is the unpleasant duty of the historian to do justice upon, as well as to, great men, it behoves me to add that the germs of the worst faults of later ioeculative morphologists are no less visible in his writings than their great merits. In the artist-philosopher there was, at best, a good deal more artist than philosopher; and when Goethe ventured into the regions which belong to pure science, this excess of a virtue had all the consequences of a vice. "Trennen und zahlen lag nicht in meiner Natur," says he; but the mental operations of which "analysis and numeration" are partial expressions are indispensable for every step of progress beyond happy glimpses, even in morphology; while, in physiology and in physics, failure in the most exact performance of these operations involves sheer disaster, as indeed Goethe was afforded abundant opportunity of learning. Yet he never understood the sharp lessons he received, and put down to malice, or prejudice, the ill-reception of his unfortunate attempts to deal with purely physical problems.
The development of exact natural knowledge in all its vast range, from physics to history and criticism, is the consequence of the working out, in this province, of the resolution to "take nothing for truth without clear knowledge that it is such"; to consider all beliefs open to criticism; to regard the value of authority as neither greater nor less than as much as it can prove itself to be worth. The modern spirit is not the spirit "which always denies," delighting only in destruction; still less is it that which builds castles in the air rather than not construct; it is that spirit which works and will work "without haste and without rest," gathering harvest after harvest of truth into its barns and devouring error with unquenchable fire.
Nothing can be more incorrect than the assumption one sometimes meets with, that physics has one method, chemistry another, and biology a third.
Gravitation cannot be held responsible for people falling in love. How on earth can you explain in terms of chemistry and physics so important a biological phenomenon as first love? Put your hand on a stove for a minute and it seems like an hour. Sit with that special girl for an hour and it seems like a minute. That's relativity.
There are metaphysical problems, which cannot be disposed of by declaring them meaningless. For, as I have repeatedly said, they are "beyond physics" indeed and demand an act of faith. We have to accept this fact to be honest. There are two objectionable types of believers: those who believe the incredible and those who believe that "belief" must be discarded and replaced by "the scientific method."
In the study of natural causes and reasons light affords the greatest pleasure to the student; among the great facts of mathematics the certainty of demonstration most signally elevates the mind of the student. Perspective must therefore be {108} placed at the head of all human study and discipline, in the field of which the radiant line is rendered complex by the methods of demonstration; in it resides the glory of physics as well as of mathematics, and it is adorned with flowers of both these sciences.
The study of non-linear physics is like the study of non-elephant biology.
I do not suppose that I am exceptionally endowed because I have all my life enjoyed a keen perception of the beauty offered us by nature and by art Now physical science may and probably will, some day, enable our posterity to set forth the exact physical concomitants and conditions of the strange rapture of beauty. But if ever that day arrives, the rapture will remain, just as it is now, outside and beyond the physical world; and, even in the mental world, something superadded to mere sensation. I do not wish to crow unduly over my humble cousin the orang, but in the aesthetic province, as in that of tine intellect, I am afraid he is nowhere. I doubt not he would detect a fruit amidst a wilderness of leaves where I could see nothing; but I am tolerably confident that he has never been awestruck, as I have been, by the dim religious gloom, as of a temple devoted to the earthgods, of the tropical forests which he inhabits. Yet I doubt not that our poor long-armed and short-legged friend, as he sits meditatively munching his durian fruit, has something behind that sad Socratic face of his which is utterly "beyond the bounds of physical science." Physical science may know all about his clutching the fruit and munching it and digesting it, and how the physical titillation of his palate is transmitted to some microscopic cells of the gray matter of his brain. But the feelings of sweetness and of satisfaction which, for a moment, hang out their signal lights in his melancholy eyes, are as utterly outside the bounds of physics as is the "fine frenzy" of a human rhapsodist.
I am glad to see that Lord Kelvin has just reprinted his reply to my plea, and I refer the reader to it. I shall not presume to question anything, that on such ripe consideration, Lord Kelvin has to say upon the physical problems involved. But I may remark that no one can have asserted more strongly than I have done, the necessity of looking to physics and mathematics, for help in regard to the earliest history of the globe.
The labour we delight in physics pain.
The labour we delight in physics pain.
It is wrong to think that the task of physics is to find out how nature is. Physics concerns what we can say about nature.
There is no likelihood man can ever tap the power of the atom.
If it smells it's chemistry, if it crawls it's biology, if it doesn't work
Could Hamlet have been written by a committee, or the Mona Lisa painted by a club? Could the New Testament have been composed as a conference report? Creative ideas do not spring from groups. They spring from individuals. The divine spark leaps from the finger of God to the finger of Adam, whether it takes ultimate shape in a law of physics or a law of the land, a poem or a policy, a sonata or a mechanical computer.
All theoretical chemistry is really physics; and all theoretical chemists
"Don't come back until you have him", the Tick-Tock Man said quietly, sincerely, extremely dangerously. They used dogs. They used probes. They used cardio plate crossoffs. They used teepers. They used bribery. They used stick tites. They used intimidation. They used torment. They used torture. They used finks. They used cops. They used search and seizure. They used fallaron. They used betterment incentives. They used finger prints. They used the bertillion system. They used cunning. They used guile. They used treachery. They used Raoul-Mitgong but he wasn't much help. They used applied physics. They used techniques of criminology. And what the hell, they caught him. -- Harlan Ellison, "Repent, Harlequin, said the Tick-Tock Man"
It is now quite lawful for a Catholic woman to avoid pregnancy by a resort to mathematics, though she is still forbidden to resort to physics and chemistry. -- H. L. Mencken
"One thing they don't tell you about doing experimental physics is that sometimes you must work under adverse conditions... like a state of sheer terror." -- W. K. Hartmann
There is no likelihood man can ever tap the power of the atom. -- Robert Millikan, Nobel Prize in Physics, 1923
First, a few words about tools. Basically, a tool is an object that enables you to take advantage of the laws of physics and mechanics in such a way that you can seriously injure yourself. Today, people tend to take tools for granted. If you're ever walking down the street and you notice some people who look particularly smug, the odds are that they are taking tools for granted. If I were you, I'd walk right up and smack them in the face. -- Dave Barry, "The Taming of the Screw"
You canna change the laws of physics, Captain; I've got to have thirty minutes!
Dear Emily: I'm still confused as to what groups articles should be posted to. How about an example? -- Still Confused Dear Still: Ok. Let's say you want to report that Gretzky has been traded from the Oilers to the Kings. Now right away you might think rec.sport.hockey would be enough. WRONG. Many more people might be interested. This is a big trade! Since it's a NEWS article, it belongs in the news.* hierarchy as well. If you are a news admin, or there is one on your machine, try news.admin. If not, use news.misc. The Oilers are probably interested in geology, so try sci.physics. He is a big star, so post to sci.astro, and sci.space because they are also interested in stars. Next, his name is Polish sounding. So post to soc.culture.polish. But that group doesn't exist, so cross-post to news.groups suggesting it should be created. With this many groups of interest, your article will be quite bizarre, so post to talk.bizarre as well. (And post to comp.std.mumps, since they hardly get any articles there, and a "comp" group will propagate your article further.) You may also find it is more fun to post the article once in each group. If you list all the newsgroups in the same article, some newsreaders will only show the the article to the reader once! Don't tolerate this. -- Emily Postnews Answers Your Questions on Netiquette
Modern psychology takes completely for granted that behavior and neural function are perfectly correlated, that one is completely caused by the other. There is no separate soul or lifeforce to stick a finger into the brain now and then and make neural cells do what they would not otherwise. Actually, of course, this is a working assumption only....It is quite conceivable that someday the assumption will have to be rejected. But it is important also to see that we have not reached that day yet: the working assumption is a necessary one and there is no real evidence opposed to it. Our failure to solve a problem so far does not make it insoluble. One cannot logically be a determinist in
-- D. O. Hebb, Organization of Behavior: A Neuropsychological Theory, 1949
At about 2500 A.D., humankind discovers a computer problem that *must* be solved. The only difficulty is that the problem is NP complete and will take thousands of years even with the latest optical biologic technology available. The best computer scientists sit down to think up some solution. In great dismay, one of the C.S. people tells her husband about it. There is only one solution, he says. Remember physics 103, Modern Physics, general relativity and all. She replies, "What does that have to do with solving a computer problem?" "Remember the twin paradox?" After a few minutes, she says, "I could put the computer on a very fast machine and the computer would have just a few minutes to calculate but that is the exact opposite of what we want... Of course! Leave the computer here, and accelerate the earth!" The problem was so important that they did exactly that. When the earth came back, they were presented with the answer: IEH032 Error in JOB Control Card.
Several students were asked to prove that all odd integers are prime. The first student to try to do this was a math student. "Hmmm... Well, 1 is prime, 3 is prime, 5 is prime, and by induction, we have that all the odd integers are prime." The second student to try was a man of physics who commented, "I'm not sure of the validity of your proof, but I think I'll try to prove it by experiment." He continues, "Well, 1 is prime, 3 is prime, 5 is prime, 7 is prime, 9 is... uh, 9 is... uh, 9 is an experimental error, 11 is prime, 13 is prime... Well, it seems that you're right." The third student to try it was the engineering student, who responded, "Well, to be honest, actually, I'm not sure of your answer either. Let's see... 1 is prime, 3 is prime, 5 is prime, 7 is prime, 9 is... uh, 9 is... well, if you approximate, 9 is prime, 11 is prime, 13 is prime... Well, it does seem right." Not to be outdone, the computer science student comes along and says "Well, you two sort've got the right idea, but you'll end up taking too long! I've just whipped up a program to REALLY go and prove it." He goes over to his terminal and runs his program. Reading the output on the screen he says, "1 is prime, 1 is prime, 1 is prime, 1 is prime..."
Invest in physics -- own a piece of Dirac!
One thing they don't tell you about doing experimental physics is that sometimes you must work under adverse conditions... like a state of sheer terror. -- W. K. Hartmann
The purpose of Physics 7A is to make the engineers realize that they're not perfect, and to make the rest of the people realize that they're not engineers.
Kaufman's First Law of Party Physics: Population density is inversely proportional to the square of the distance from the keg.
After this was written there appeared a remarkable posthumous memoir that throws some doubt on Millikan's leading role in these experiments. Harvey Fletcher (1884-1981), who was a graduate student at the University of Chicago, at Millikan's suggestion worked on the measurement of electronic charge for his doctoral thesis, and co-authored some of the early papers on this subject with Millikan. Fletcher left a manuscript with a friend with instructions that it be published after his death; the manuscript was published in
first to do the experiment with oil drops, was the first to measure charges on
single droplets, and may have been the first to suggest the use of oil.
According to Fletcher, he had expected to be co-authored with Millikan on
the crucial first article announcing the measurement of the electronic
charge, but was talked out of this by Millikan.
-- Steven Weinberg, "The Discovery of Subatomic Particles"
Robert Millikan is generally credited with making the first really
precise measurement of the charge on an electron and was awarded the
Nobel Prize in 1923.
Modern psychology takes completely for granted that behavior and neural function are perfectly correlated, that one is completely caused by the other. There is no separate soul or lifeforce to stick a finger into the brain now and then and make neural cells do what they would not otherwise. Actually, of course, this is a working assumption only. ... It is quite conceivable that someday the assumption will have to be rejected. But it is important also to see that we have not reached that day yet: the working assumption is a necessary one and there is no real evidence opposed to it. Our failure to solve a problem so far does not make it insoluble. One cannot logically be a determinist in physics and biology, and a mystic in psychology. -- D. O. Hebb, "Organization of Behavior: A Neuropsychological Theory", 1949
There is no realizable power that man cannot, in time, fashion the tools to attain, nor any power so secure that the naked ape will not abuse it. So it is written in the genetic cards -- only physics and war hold him in check. And also the wife who wants him home by five, of course. -- Encyclopadia Apocryphia, 1990 ed.
All science is either physics or stamp collecting. -- Ernest Rutherford
What with chromodynamics and electroweak too Our Standardized Model should please even you, Tho' once you did say that of charm there was none It took courage to switch as to say Earth moves not Sun. Yet your state of the union penultimate large Is the last known haunt of the Fractional Charge, And as you surf in the hot tub with sourdough roll Please ponder the passing of your sole Monopole. Your Olympics were fun, you should bring them all back For transsexual tennis or Anamalon Track, But Hollywood movies remain sinfully crude Whether seen on the telly or Remotely Viewed. Now fasten your sunbelts, for you've done it once more, You said it in Leipzig of the thing we adore, That you've built an incredible crystalline sphere Whose German attendants spread trembling and fear Of the death of our theory by Particle Zeta Which I'll bet is not there say your article, later. -- Sheldon Glashow, Physics Today, December, 1984
The study of non-linear physics is like the study of non-elephant biology.
"Yo, Mike!" "Yeah, Gabe?" "We got a problem down on Earth. In Utah." "I thought you fixed that last century!" "No, no, not that. Someone's found a security problem in the physics</p> program. They're getting energy out of nowhere." "Blessit! Lemme look... <tappity clickity tappity> Hey, it's there all right! OK, just a sec... <tappity clickity tap... save... compile> There, that ought to patch it. Dist it out, wouldja?" -- Cold Fusion, 1989
On the other hand, the TCP camp also has a phrase for OSI people. There are lots of phrases. My favorite is `nitwit' -- and the rationale is the Internet philosophy has always been you have extremely bright, non-partisan researchers look at a topic, do world-class research, do several competing implementations, have a bake-off, determine what works best, write it down and make that the standard. The OSI view is entirely opposite. You take written contributions from a much larger community, you put the contributions in a room of committee people with, quite honestly, vast political differences and all with their own political axes to grind, and four years later you get something out, usually without it ever having been implemented once. So the Internet perspective is implement it, make it work well, then write it down, whereas the OSI perspective is to agree on it, write it down, circulate it a lot and now we'll see if anyone can implement it after it's an international standard and every vendor in the world is committed to it. One of those processes is backwards, and I don't think it takes a Lucasian professor of physics at Oxford to figure out which. -- Marshall Rose, "The Pied Piper of OSI"
Q: How can I choose what groups to post in? ... Q: How about an example? A: Ok. Let's say you want to report that Gretzky has been traded from the Oilers to the Kings. Now right away you might think rec.sport.hockey would be enough. WRONG. Many more people might be interested. This is a big trade! Since it's a NEWS article, it belongs in the news.* hierarchy as well. If you are a news admin, or there is one on your machine, try news.admin. If not, use news.misc. The Oilers are probably interested in geology, so try sci.physics. He is a big star, so post to sci.astro, and sci.space because they are also interested in stars. Next, his name is Polish sounding. So post to soc.culture.polish. But that group doesn't exist, so cross-post to news.groups suggesting it should be created. With this many groups of interest, your article will be quite bizarre, so post to talk.bizarre as well. (And post to comp.std.mumps, since they hardly get any articles there, and a "comp" group will propagate your article further.) You may also find it is more fun to post the article once in each group. If you list all the newsgroups in the same article, some newsreaders will only show the the article to the reader once! Don't tolerate this. -- Brad Templeton, _Emily Postnews Answers Your Questions on Netiquette_