Copenhagen (Danish: København [kʰøpm̩ˈhɑwˀn] (listen)) is the capital and most populous city of Denmark. As of 1 January 2020, the city had a population of 794,128 with 632,340 in Copenhagen Municipality, 104,305 in Frederiksberg Municipality, 42,989 in Tårnby Municipality, and 14,494 in Dragør Municipality. It forms the core of the wider urban area of Copenhagen (population 1,336,982) and the Copenhagen metropolitan area (population 2,057,142). Copenhagen is situated on the eastern coast of the island of Zealand; another portion of the city is located on Amager, and it is separated from Malmö, Sweden, by the strait of Øresund. The Øresund Bridge connects the two cities by rail and road.
Originally a Viking fishing village established in the 10th century in the vicinity of what is now Gammel Strand, Copenhagen became the capital of Denmark in the early 15th century. Beginning in the 17th century, it consolidated its position as a regional centre of power with its institutions, defences, and armed forces. During the Renaissance the city served as the de facto capital being the seat of government of the Kalmar Union, governing the entire present day Nordic region in a personal union with Sweden and Norway ruled by the Danish monarch serving as the head of state. The city flourished as the cultural and economic center of Scandinavia under the union for well over 120 years, starting in the 15th century up until the beginning of the 16th century when the union was dissolved with Sweden leaving the union through a rebellion. After a plague outbreak and fire in the 18th century, the city underwent a period of redevelopment. This included construction of the prestigious district of Frederiksstaden and founding of such cultural institutions as the Royal Theatre and the Royal Academy of Fine Arts. After further disasters in the early 19th century when Horatio Nelson attacked the Dano-Norwegian fleet and bombarded the city, rebuilding during the Danish Golden Age brought a Neoclassical look to Copenhagen's architecture. Later, following the Second World War, the Finger Plan fostered the development of housing and businesses along the five urban railway routes stretching out from the city centre.
Since the turn of the 21st century, Copenhagen has seen strong urban and cultural development, facilitated by investment in its institutions and infrastructure. The city is the cultural, economic and governmental centre of Denmark; it is one of the major financial centres of Northern Europe with the Copenhagen Stock Exchange. Copenhagen's economy has seen rapid developments in the service sector, especially through initiatives in information technology, pharmaceuticals and clean technology. Since the completion of the Øresund Bridge, Copenhagen has become increasingly integrated with the Swedish province of Scania and its largest city, Malmö, forming the Øresund Region. With a number of bridges connecting the various districts, the cityscape is characterised by parks, promenades, and waterfronts. Copenhagen's landmarks such as Tivoli Gardens, The Little Mermaid statue, the Amalienborg and Christiansborg palaces, Rosenborg Castle Gardens, Frederik's Church, and many museums, restaurants and nightclubs are significant tourist attractions.
Copenhagen is home to the University of Copenhagen, the Technical University of Denmark, Copenhagen Business School and the IT University of Copenhagen. The University of Copenhagen, founded in 1479, is the oldest university in Denmark. Copenhagen is home to the F.C. Copenhagen. The annual Copenhagen Marathon was established in 1980. Copenhagen is one of the most bicycle-friendly cities in the world.
The Copenhagen Metro, launched in 2002, serves central Copenhagen. Additionally, the Copenhagen S-train, the Lokaltog (private railway), and the Coast Line network serve and connect central Copenhagen to outlying boroughs. Serving roughly two million passengers a month, Copenhagen Airport, Kastrup, is the busiest airport in the Nordic countries.
So, let's say that a star 50,000 light years distant does not exist until it is observed. One day I look up and see a bright star and it's waveform collapses into existence as we know it. Now suppose my pet kitty observes it, does the waveform collapse? What if a tiny bug saw the star? It has...
Hi all,
I have read in several places about an "old Copenhagen Interpretation" and I wonder what are the differences between the old one and the current one.
I read several times Wikipedia article about CI but had no success finding any references about the old one.
I guess that the old...
It will not have escaped the attention that the world nations have gathered in Copenhagen to save the globe from climage change. The Jakarta Post narrates.
I wonder about this:
But geologists read http://www.agu.org/pubs/crossref/1987/JB092iB06p04905.shtml...
Has anyone heard any of the details of the Copenhagen Agreement? Think there is any truth to this?
http://online.wsj.com/article/SB10001424052748703574604574500580285679074.html?mod=googlenews_wsj
I don’t like CI. But I was always thinking that CI is an idealistic interpretation, based on the consciousness and the existence of intelligent observers.
In Bohr’s time it was simple. He believed in a sharp line between quantum world and macroscopic world. Quantum event Q was registered by...
Many physicists say that they prefer the "Copenhagen" interpretation of QM, but it does not mean that all these physicists prefer the same (or even a very similar) interpretation. There are at least 4 very different interpretations that are sometimes referred to as "Copenhagen":
1. Shut up...
Can someone explain how Hardy's Paradox is resolved? As well, what could someone infer from this regarding both Copenhagen Interpretation and Bohm's theory?
I started this thread to continue the following discussion from the thread:
https://www.physicsforums.com/showthread.php?p=2203566#post2203566"
But you and Weinberg are both making a mistake in assuming ontological status to both the collapse of the wave function and to entanglement...
I don't like CI but let's play by its rules for a while
So, in the mainstream CI wavefunction is non physical: it is just our subjective 'knowledge' of the system.
So, I use an experimental device: I put a cat inside the box, and press a button. The device inside the box works based on...
Bohr believed that the observer effected the outcome of an experiment at the subatomic level, and it wasn't necessarily the photons used to measure the particle like in Hesienberg's Uncertainty Principle that effected the outcome. What was the basis of this idea if the only way to measure...
The Copenhagen interpretation, (the wavefunction collapse) is not what caught the interest and imagination of the scientific community.
It was the Schrödinger's Cat. Is the cat alive or dead?
“QGsquared” will not catch the imagination of the 10’s of thousands of interested people by saying...
Could someone explain to me how the delayed choice experiment is described within the framework of the Copenhagen interpretation? (Double slit experiment with two slits open but a late decission to measure the path of the particle). I do not understand how the deterministic evolution of the...
Just had four quick questions on the Copenhagen Interpretation (CI).
1. Where is the boundary between realm (classical) space and quantum space. I understand that there is no solid definition for this boundary, but where would we begin to see quantum events occur and see classical events...
Hello,
First post.
I have been doing a lot of reading in quantum physics, and I am really riled up about some things. First off, I get the feeling when reading those who defend the Copenhagen Interpretation (CI) that they are earnestly trying to put one over on me.
I'm a rational guy. I...
Hi,
Can we know the Copenhagen interpretation, a result of uncertainty principle?
If you don't agree with that, mention your reasons to see taht will conclude a
safe answer or not.
Thanks.
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Formulate realities.
Hi,
I just had this argument with this person on another forum and the gist of it was that he was saying collapse is predictable to within a negligible precision if you average out the results a huge number of identical wave-particles that had already collapsed.
My contention was that...
I found a website that says:
"The still-dominant "Copenhagen interpretation" of Quantum Theory developed by Niels Bohr, Werner Heisenberg, Wolfgang Pauli, and others says two basic things:
1. Reality is identical with the totality of observed phenomena (which means reality does not exist...
play "Copenhagen" by Michael Frayn
Ok, this may seem a bit weird, and maybe it seems inappropriate for the physics forum... but eh, move it somewhere more appropriate if necessary.
Ok, first, this is with regards to the play "Copenhagen" by Michael Frayn. if you've read it or seen it...
hiya! Does anyone know of any logical expressions of the Copenhagen Interpretation. I've read about it, I can summarize it, but I've never really seen anything other than discussions of it in pop-science books.
I'd really like to break it down if I could.
Professor John Cramer, author of the transactional interpretation of QM, recently gave a talk at Boskone, the famous science fiction con, that sugggests a new experiment may be about to falsify the predictions of the Copenhagen and Many Worlds interpretations(and also decoherence and Consistent...