In modern physics, there is no such thing as "nothing." Even in a perfect vacuum, pairs of virtual particles are constantly being created and destroyed. The existence of these particles is no mathematical fiction. Though they cannot be directly observed, the effects they create are quite real. The assumption that they exist leads to predictions that have been confirmed by experiment to a high degree of accuracy.
Richard MorrisMots clés science philosophy quantum-physics physics vacuums god-particles matter-and-anti-matter particle-physics
Despite my resistance to hyperbole, the LHC belongs to a world that can only be described with superlatives. It is not merely large: the LHC is the biggest machine ever built. It is not merely cold: the 1.9 kelvin (1.9 degrees Celsius above absolute zero) temperature necessary for the LHC’s supercomputing magnets to operate is the coldest extended region that we know of in the universe—even colder than outer space. The magnetic field is not merely big: the superconducting dipole magnets generating a magnetic field more than 100,000 times stronger than the Earth’s are the strongest magnets in industrial production ever made.
And the extremes don’t end there. The vacuum inside the proton-containing tubes, a 10 trillionth of an atmosphere, is the most complete vacuum over the largest region ever produced. The energy of the collisions are the highest ever generated on Earth, allowing us to study the interactions that occurred in the early universe the furthest back in time.
Mots clés physics large-hadron-collider vacuum magnets particle-accelerators particle-physics
Is the purpose of theoretical physics to be no more than a cataloging of all the things that can happen when particles interact with each other and separate? Or is it to be an understanding at a deeper level in which there are things that are not directly observable (as the underlying quantized fields are) but in terms of which we shall have a more fundamental understanding?
Julian SchwingerMots clés science purpose understanding physics quantum-mechanics fundamentals nobel-laureate particle-physics theoretical-physics
String theory is an attempt at a deeper description of nature by thinking of an elementary particle not as a little point but as a little loop of vibrating string.
Edward WittenMots clés science nature naturalism physics materialism laws-of-nature description gravity big-bang string-theory particle-physics origin-of-the-universe origin-of-universe elementary-particles institute-for-advanced-study m-theory
The history of atomism is one of reductionism – the effort to reduce all the operations of nature to a small number of laws governing a small number of primordial objects.
Leon M. LedermanMots clés science reductionism nature physics atoms nobel-laureate cern particle-physics atomic-theory natural-laws atomism
Page 1 de 1.
Data privacy
Imprint
Contact
Diese Website verwendet Cookies, um Ihnen die bestmögliche Funktionalität bieten zu können.