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?
" ... However, regardless of those differences, the fact that gravitational waves follow the null geodesics of curved space give us one unambiguous answer to the original question: when an external gravitational wave propagates into a region of space where there is an event horizon, what happens to those waves? ... "
" ... The force exchanges inside a proton, mediated by colored quarks, can only move at the speed of... [+] light; no faster. Inside a black hole's event horizon, these light-like geodesics are inevitably drawn to the central singularity. ... "
" ... This is a wonderful question … in the first instance, it’s answered by Einstein’s theory of general relativity. (Spoiler alert, light travels along geodesics, which are approximately straight lines in most circumstances that humans encounter in everyday life, but are curved by gravity). It’s also interesting because there is some sense in which light does have “mass” (and therefore should be influenced by gravity… read on!) ... "