Reality’ is the idea that there is a real world that exists whether or not anyone is looking at it, or measuring it.
According to the Copenhagen Interpretation, when an electron is ejected from an electron ‘gun’ on one side of the experiment it leaves as a particle, and can be detected as a particle. But it immediat...
The best things in science are both beautiful and simple, a fact that all too many teacher conceal from their students, by accident or design.
The Big Bang was not the beginning of the Universe.
Motion in space can proceed in any direction and back again. Motion in time only proceeds in one direction in the everyday world, whatever seems to be going on at the particle level. It’s hard to visu...
A black hole with the mass of the Sun would take 1066 years for this to occur, even if it never swallowed any outside matter along the way. A black hole with the mass of a galaxy will evaporate in 109...
There is no underlying reality to the world. Reality, in the everyday sense, is not a good way to think about the behavior of the fundamental particles that make up the universe; yet at the same time...
True story of quantum mechanics, a truth far stranger than any fiction.
Whole universe can be thought of as a delayed-choice experiment in which the existence of observers who notice what is going on is what imparts tangible reality to the origin of everything. Following
In 1906, ill and depressed, unhappy about the continuing opposition of many leading scientists to this kinetic theory of gases, he killed himself,
The image that emerges from quantum physics is similar in some ways to the way that the illusion that air, or water is a continuous fluid emerges. Myriad tiny particles separated by tiny gaps feels to...
It is a capital mistake to theorise before one has data. Insensibly, one begins to twist facts to suit theories, instead of theories to suit facts.
القيود المحدَّدة أمر كامن في نماذجنا و في تصورنا البشري، لأننا نحاول أن نصف شيئًا، هو ككل لا يشبه أي شيء مما نخبره بحواسنا. التشويش الذي نشعر به عندما نحاول تصور كيف أن الضوء يمكنه أن يكون معًا موجة و...
Spacetime is flat, that about 5 per cent of the mass of the Universe is in the form of baryons (including bright stars and gas and dust), some 27 per cent is in the form of cold dark matter, and 68 pe...
Curiously, though, we only have to look at one of the two slits for the outcome of the whole experiment to be affected, as if the electrons passing through the other slit also knew what we were doing....
The existence of life must be considered as an elementary fact that cannot be explained, but must be taken as a starting point in biology, in a similar way as the quantum of action, which appears as a...
At one point, Einstein had commented: ‘It is quite wrong to try founding a theory on observable magnitudes alone. In reality the very opposite happens. It is the theory which decides what we can obser...