
יום שישי, 29 באוגוסט 2008
Homemade recording studio

יום רביעי, 27 באוגוסט 2008
On the lighter side...

There is a big issue in the U.S.A. regarding teaching an 'alternative' to Darwin's evolution theory which is called 'intelligent design'. The intelligent design advocates use pseudoscientific arguments, and claim that life is so complex that an intelligent entity (GOD) must have designed it. An amusing retort is suggested in form of the new Church of the flying spaghetti monster which uses similar pseudoscience to prove that our creator is... well... a flying spaghetti monster (see picture at the top).
יום שני, 25 באוגוסט 2008
Do you understand quantum mechanics?

The most relevant example is that of Newton's laws: To those of us that studied and practiced some problems of Newtonian mechanics, these laws of motion and graviational force seem simple enough, even intuitive. Most of my coleagues say they understand Newton's laws. But do we really understand them? On close inspection these laws are quite weird. Many scientists and philosophers objected to the theory at the time that it was suggestd (a few persisted in objecting for many years later). According to Newton:
- Every two bodies attract each other, no matter how far they are. This was objected to on philosophical grounds, asking how could there be action at a distance between two bodies that don't touch each other?
- The force acts instantaniously. Information is exchanged between any two bodies at an infinite velocity.
These objections to the theory are important, they were solved by Einstein's general theory of relativity (1915) which is an extension of Newton's laws. But that does not mean that we do not understand Newton's laws. On the same token, people that study quantum mechanics and practice some problems, get an intuition about the theory. I think we CAN say we understand quantum mechanics just as we say we understand Newton's laws. As for the open question of the 'quantum mechanical measurement problem', this should be studied and hopefully a solution will be found one day which extends the quantum mechanics theory just as general relativity extended Newton laws.
The picture at the top shows the late Prof. Richard Feinman with his family. In the background you can see Feinman's car with 'Feinman diagrams' drawn on it.
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