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Physics, Astronomy & Cosmology / Re: Does Einstein believe in gravitational wave ?????
« on: 24/03/2016 16:07:39 »Do you have a link to the 1938 paper?I have alot of it but I don't know how to post the external link.
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Do you have a link to the 1938 paper?I have alot of it but I don't know how to post the external link.
Einstein was very (very) smart, and spent a lot of time thinking about relativity, so I'm sure he understood it quite well. However, just because he was the first to present the theory does not mean he knows the most about it. There has been a century of other brilliant physicists testing, thinking about, and arguing about theories of relativity--their collective understanding has been distilled into textbooks that any student of physics now has to study.
The very fact that Einstein had few people he could discuss the theory with on even footing, and that it wasn't taught to him means that he is at a disadvantage compared to students today. That said, he was extremely smart, and had (or developed) an excellent intuition about relativity, that many today might not have.
Thank you for your answer. My answer that I want to know is How does Einstein think about space time curvature . In many book that I have read must start with Equivalence principle in year 1907 and then they both go to spacetime curvature without explained How einstein got this idea from .Quote from: parakornI have read many book about The General Relativity. Einstein started with the equivalence between Acceleration and Gravity.That part is most certainly correct. However when this is explained like that the fact that it's only valid locally is withheld. It's only later reveled, if at all, that it only applies locally, i.e. within a limited region of space for a limited amount of time.Quote from: parakornAnd almost of the book jump to the space time curvature.That too is often correct but most don't explain why or they don't do if very well.Quote from: parakornI don't understand it how did Einstein find the path way from the equivalence principle to The spacetime curvature.Because Einstein had to be able to explain the arbitrary gravitational field and not merely those which are locally equivalent.Quote from: parakornWho know about it please explain meSure. I'll contact a friend in that field and as him for some references for you to year. Also read my article on this subject at
http://xxx.lanl.gov/abs/physics/0204044
General Relativity will be taught in Physics classes, starting at the undergraduate level (bachelors).
At my university, they divided intro physics into 3 classes:I think the concepts were just introduced in the intro class, but there were more classes on relativity in the undergraduate physics program.
- Physics for non-majors without calculus (Newtonian Physics)
- Physics for non-majors with calculus (Newtonian Physics)
- Physics for physics majors with calculus (intro to relativity).
Obviously the subjects could also be covered in more depth in a Masters or PhD program.
Ambitious undergraduate students could also take most of the classes that would be offered to graduate students.
Thank you []A fter I have come back to read the article again and again many time. In my understanding from the article are There are two version of General relativity once is einstein version and another was modern version. In Einstein version there are 2 type of gravitational field 1. uniform gravitational field that can conclude that gravitaty is the same as acceleration that we can create gravitational by changing of the coordinate there is no curvature of space time in this type of gravitational field. 2. Permanent Gravitatinal field is the space time curvature that is the same thing with tidal force. In modern view physicist confuse in 2 type of the field and conclude that uniform gravitational field is the same thing with curvature of space time.That wrong interpretation. Does I read it correctly or notI'm so glad to see that you've got it now. It warms my heart to see that I was able to get through to someone. Thanks for your diligence!
for example http://en.wikisource.org/wiki/Relativity:_The_Special_and_General_Theory/Part_II section 23-section 27 and section 31-32Quote from: parakornBut in truth there are many time that Einstein said that gravity is the curvature of space time.No there isn't. If you beg to differ, give a few reference where he did say that.
first page that you wrote that "Einstein identified the existence of gravity with the inertial motion ofI think that I have read your article clearly, Your article try to proof that there are two version of The General relativity the Einstein version and The modern version.You try to proof that Einstein did not determine the gravity as the space time curvature.Then you read it wrong. The article only refers to the interpretation of how the term "gravitational field" is defined. Einstein defined it one way and others defined it another way. I know that's what the author means because I'm the author. Anything else is your interpretation. If you claim that I said otherwise then please post the page number and the sentence in which you claim I said it.