100 Years of Einstein's Relativity (And How it Underlies Our Modern Understanding of the Universe)

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1. The problems of general relativity arise when you look at the Universe at very small or at very large scales. What's wrong with general relativity ?
   
   New finding in 2010 you don't know before, in general theory of relativity Albert Einstein ignored refraction of light. Einstein's proving method (EPM) via eclipse is unscientific and deeply wrong. It is very surprising. Please read on the reliable source the book The Universe and DR.Einstein, by Lincoln Barnett, London, 1949, Preface by Albert Einstein himself, page 78 - 79.
   
   Einstein's gravity is wrong. Deflection of light is caused by refraction, not gravity. Time-delay is caused by refraction of light, not gravity. Gravitational redshift is false.Redshift is caused by refraction. Lensing is caused by refraction, not gravity.....etc.
2. What is a "modern understanding", please.
   You are a snake oil salesman.
3. when all you got is relativity, everything proves relativity.
4. silly con job valley
5. So earth is moving in a straight line at constant speed on (near)vacuum space - The reason we are circling sun is "sun bend the space".As space is not a perfect vacuum we will loose speed and feel in to the curve to collide sun.. I am confused , am i correct?
6. Einstein Theory  of Relativity is basic theory of the how the Word is working.
7. 3:43 Is that a valid assumption in Silicon Valley?
8. I have a problem with Dr. Bennett's explanation of the twin paradox. There is no need to postulate rockets checking how fast the time is going. Supposing the hair of these twins turns white when they are 50 years old. Supposing one twin is on earth while the other is on a rocket that flies away at 99% of the speed of light and then comes back so that the twin on the rocket only aged 7 years whereas the twin on earth aged 50 years. In that case when the twin on the rocket steps off his rocket onto earth the earth twin will have white hair while he still has dark hair. The problem is that according to relativity the twin on the rocket sees the earth as having moved away at 99% of the speed of light. So from his perspective the man on earth only aged 7 years. So the rocket twin should have white hair and the earth twin should have dark hair. Who has dark hair and who has white hair Dr. Bennett?
9. okay this is a lecture for ten year olds...next  lecture...
10. The correct answer was B. Since the mass of the sun hasn't changed just its radius has become smaller i.e. it is now a black hole, the Earth would remain in the same orbit; Newton's two masses over the inverse square law. The sun is no longer radiating heat and light, so yes, as B states the orbit stays the same, but the Earth gets dark and cold.
11. "Recapitulating, we may say that according to the general theory of relativity space is endowed with physical qualities; in this sense, therefore, there exists an ether. According to the general theory of relativity space without ether is unthinkable; for in such space there not only would be no propagation of light, but also no possibility of existence for standards of space and time (measuring-rods and clocks), nor therefore any space-time intervals in the physical sense. But this ether may not be thought of as endowed with the quality characteristic of ponderable media, as consisting of parts which may be tracked through time. The idea of motion may not be applied to it."
    
    Albert Einstein 1920
12. [07:55] ANSWER: D. The orbit of Earth would spiral down to a Mercury-like orbit over cosmic eons by the contra-expansion of space into the high-Z event-horizon of the collapsing hole... [10:49] WRONG ANSWER: This clown hasn't gedunken his donots... [11:31] "...go through the wormhole—and come out around this supermassive black hole..." So, what about their gravi-potential-energy-jump from here-to-there: they don't-make siphon, or, they 'beam-out' hyper... This clown is 'F'-ing his 'A' and that's not slang: that's his professorial grade (Colorado 'eh')... [21:25] Both are-not, equally, correct: the accelerated vehicle goes through a self-contraction (including its ruler) orders-of-magnitude-greater-than-Einstein's... MATH: 'D' *END OF LINE*
13. Thank you for a great talk..
14. 100 years ago, people were not relative and earth was flat. And then after Einsteins relativity, Japan exploded.
15. Dr. Bennett is slightly wrong around 1:12:30, where he states or implies that there are no disagreements on events. A car will crash for every observer and so on. Well, that is true, but only "almost completely true". There is an exception to that rule, which is where there was a major discussion within astrophysics between Hawking and Susskind (IIRC) regarding an infalling object into a black hole. The object itself will go through the event horizon and be crushed at the singularity, but for anyone outside, it will never even reach the event horizon. There are paradoxes here which can still be resolved, but are clearly a breach on that rule dr. Bennett stated.
16. Great talk.