the generalization of the cosmological constant to a dynamic fluid, is a huge area of current theoretical study, where one can uncharitably say that there are no well-motivated theories! It is therefore crucial to have the views of a clear-thinking expert to help us navigate this topic, and...
These theories address some of the most pressing questions scientists have about the Universe and the physical laws governing it – like the nature of gravity, Dark Matter, and Dark Energy. For decades, scientists have postulated that either there is additional physics at work or that our ...
The Physics of the Universe - Difficult Topics Made Understandable - The Big Bang, Black Holes, Quantum Theory, Relativity, Cosmological Theories, etc
This is an almost unavoidable phenomenon in unified theories, and the idea that the defects later seeded structure in the universe was very appealing. Unfortunately, as I review, recent accurate computations of the clustering of mass and the microwave anisotropies in these theories, combined with ...
"Most of us believe that the universe makes sense,"Greene said.Although there are several interesting theories about time travel,he added,the laws of physics would probably prevent something so illogical from taking place.The good news is that the time paradox (悖论) is open for future ...
CHAPTER 7: Working the Physics Way. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123 A Different Kind of Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Theoretical or Mathematical/ cosmic background radiation cosmology electron pair production lepton decay leptonic decays neutrinos unified field theories/ neutrino ' decay into neutrino+positron+electron neutrino ' decay into neutrino+neutrino+antineutrino unstable-neutrino explanation reheating Universe cosmic-bac...
Physics is the search for and application of rules that can help us understand and predict the world around us. Central to physics are ideas such as energy, mass, particles and waves. Physics attempts to both answer philosophical questions about the nature of the universe and provide solutions ...
the scene. While relativity is great at describing the universe on visible scales, quantum physics tells us all about the way things work on the level of atoms and subatomic particles. According to quantum theories, if you examine the fabric of space-time close enough, it should be m...
Both of these theoriescame about(9)inaccuracies in classical mechanics incertain situations. Classical mechanics predicted a(10)(vary)speedof light, which(11)not be resolved with the constant speed predictedby Maxwell's equations of electromagnetism; this difference was corrected byEinstein's theory ...