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?
" ... A light-clock, formed by a photon bouncing between two mirrors, will define time for any observer. ... [+] Although the two observers may not agree with one another on how much time is passing, they will agree on the laws of physics and on the constants of the Universe, such as the speed of light. A stationary observer will see time pass normally, but an observer moving rapidly through space will have their clock run slower relative to the stationary observer. ... "
" ... In other words, it's not even close. A single photon from the cosmic microwave background carries about a million times more energy, on average, than all of the Hawking radiation emitted each second by a realistic black hole. Given that a 2.5 solar mass black hole absorbs about 1025 of these photons each second, it's clear that every black hole in the Universe is growing, not decaying. If you wanted your black hole to decay faster, you have two options: ... "
" ... In the open example, the photon takes one path or the other, only showing up in one detector. In the closed example, the photon must take both paths to interfere with itself. Wheeler realized that, if you passed the photon through the first beam splitter, you could then “swap” the second splitter, flipping it either open or closed as you like, to try to catch the photon in the act of being either a wave or a particle. ... "
" ... The first limitation is easy to understand. When you open your eyes on the Universe, you’re going to collect light from everything that’s out there, one photon at a time. No matter how long you observe for, you’ll only collect a finite amount of light with your finite-sized mirror, fundamentally limiting how faint of an object you can see. You can find fainter objects if they’re closer, but even the brightest objects will no longer be visible if they’re too far away. ... "