Einstein's work on the Photoelectric effect, which won him the Nobel prize in 1921 was a bulwark of Quantum Mechanics. Einstein went off in another direction because of his inate suspicion that Quantum Mechanics has severe internal difficulties. Quantum Mechanics and Relativity have not yet been reconciled--but they are moving together slowly. Quantum Gravity seems to be key to the issue and may be resolved by String Theory.
Albert Einstein developed the theories of general relativity and special relativity. He also did work in quantum theory. (He won a Nobel prize for his work with light.)
Quantum mechanics and relativity are both parts of the same puzzle: how the universe works. They are both equally important, because they both explain things that are not explained by classical physics.
This is the question that physicists all around the world are trying to answer. When they come up with one I'll be sure to get back to you. This area is primarily the work of string theorists.AnswerI think the previous answerer misread the question. If the question had been "When and where do general relativity and quantum mechanics overlap?" then this answer would have been fine. But there is no conflict between Newton's Laws and quantum mechanics. More precisely: If you take quantum mechanics and let Planck's constant tend to 0, you get Newtonian physics. (Or special relativity - but if you then let the speed of light tend to infinity you get Newtonian physics.) In other words, classical physics is a special case of quantum physics. If you avoid doing experiments with very small or very fast things, Newton's laws will hold.
actually einstein developed one of the earliest parts of quantum mechanics: the theory of the photoelectric effect. he worked directly with many of the scientists that later developed the complete theory of quantum mechanics and the mathematics to solve its apparent paradoxes to get usable predictions from the theory. later he rejected it due to it being nondeterministic, not because he didn't understand quantum mechanics but because he did understand quantum mechanics. he then tried to combine quantum mechanics and general relativity, hoping the resulting unified field theory would resolve the nondeterminism of quantum mechanics, resulting in a single fully deterministic theory of everything.
The mixed state in quantum mechanics is the statistical ensemble of the pure states.
The distinction is sometimes made to distinguish normal quantum mechanics (which does not incorporate special relativity) and quantum field theory (relativistic quantum mechanics). Since we know special relativity is correct it is the relativistic form of quantum mechanics which is true, but non-relativistic quantum mechanics is still used, because it is a good approximation at low energies and it is much simpler. Physics students typically study regular quantum mechanics before moving on to quantum field theory.
Quantum Mechanics
Because they do not iclude quantum mechanics and general relativity
Albert Einstein developed the theories of general relativity and special relativity. He also did work in quantum theory. (He won a Nobel prize for his work with light.)
the theory of relativity & quantum mechanics.
The six divisions of physics are classical mechanics, thermodynamics and statistical mechanics, electromagnetism, quantum mechanics, relativity, and astrophysics/cosmology. These branches cover the study of various natural phenomena and form the foundation of our understanding of the physical world.
nothing, they appear to contradict each other.
Quantum Mechanics "replaced" Classical Mechanics in particle physics in mid-1930s.
No, string theory is an attempt to bridge the gap between EVERYTHING, not just relativity and quantum, into one fundamental theory.
Quantum mechanics and relativity are both parts of the same puzzle: how the universe works. They are both equally important, because they both explain things that are not explained by classical physics.
Albert Einstein is famous for his theory of relativity, which revolutionized our understanding of space, time, and gravity. He also made significant contributions to the development of quantum mechanics and the photoelectric effect. His most famous equation, E=mc^2, demonstrates the relationship between energy and mass.
Mechanics Thermodynamics Sound Light Optics Magnetism Electricity