Caution! The site can't guarantee, that text has age permission. The site is not recommended, if you are less than 18 years old.
The site shows example sentences for English words. How the word or phrase could be used in a sentence?
" ... If you want to fully describe how the Universe works at a fundamental level, you have to look at it in two different — and incompatible — ways. To describe the particles and their electromagnetic and nuclear interactions, you need to use the framework of quantum field theory (QFT), where quantum fields permeate the Universe and their excitations give rise to the particles we know of. To describe how every quantum of matter and energy moves through the Universe, we need the framework of General Relativity (GR), where matter and energy define how spacetime is curved, and curved spacetime tells matter and energy how to move. ... "
" ... The unambiguous signals of string theory are the Regge excitations of particles -- the spin 3 version of the graviton, followed by the spin 4 version. These resonances could appear anywhere between 10 TeV (in the realm of probable by the LHC) in rest mass energy and 10^16 TeV (which won't be easy to directly probe by any foreseeable experiments). ... "
" ... This led Einstein to propose that the electromagnetic field itself consists of quanta. That is to say, at any given frequency, “excitations” of the electromagnetic field come in set, countable units. This basically assigns a minimum energy level to light of a given frequency: the energy of one unit of excitation. This explanation was found to be in good agreement with observational data and eventually (though there was much skepticism initially; some even thought Einstein made a blunder) earned Einstein his sole Nobel prize. ... "