Quotes About Observation

In fact, according to quantum physics, each particle has some probability of being found anywhere in the universe.

was generally thought that all knowledge of the world could be obtained through direct observation

Our modern picture of the universe dates back to only 1924, when the American astronomer Edwin Hubble demonstrated that ours was not the only galaxy. There were in fact many others, with vast tracts of empty space between them.

There might be one history in which the moon is made of Roquefort cheese. But we have observed that the moon is not made of cheese, which is bad news for mice. Hence histories in which the moon is made of cheese do not contribute to the present state of our universe, though they might contribute to others. That might sound like science fiction, but it isn't.

Until the advent of modern physics it was generally thought that all knowledge of the world could be obtained through direct observation, that things are what they seem, as perceived through our senses. But the spectacular success of modern physics, which is based upon concepts such as Feynman's that clash with everyday experience, has shown that that is not the case. The naive view of reality therefore is not compatible with modern physics.

Our very existence imposes rules determining from where and at what time it is possible for us to observe the universe. That is, the fact of our being restricts the characteristics of the kind of environment in which we find ourselves. That principle is called the weak anthropic principle.

There is no way to remove the observer—us—from our perception of the world

philosopher of science Karl Popper has emphasized, a good theory is characterized by the fact that it makes a number of predictions that could in principle be disproved or falsified by observation. Each time new experiments are observed to agree with the predictions, the theory survives and our confidence in it is increased; but if ever a new observation is found to disagree, we have to abandon or modify the theory.

The lack of an absolute standard of rest meant that one could not determine whether two events that took place at different times occurred in the same position in space. For example, suppose our Ping-Pong ball on the train bounces straight up and down, hitting the table twice on the same spot one second apart. To someone on the track, the two bounces would seem to take place about thirteen meters apart, because the tram would have traveled that far down the track between the bounces.

El principio antrópico dice que el universo tiene que ser más o menos como lo vemos, porque si fuera diferente no habría nadie para observarlo.

As philosopher of science Karl Popper has emphasized, a good theory is characterized by the fact that it makes a number of predictions that could in principle be disproved or falsified by observation. Each time new experiments are observed to agree with the predictions, the theory survives and our confidence in it is increased; but if ever a new observation is found to disagree, we have to abandon or modify the theory.

the light that we see from distant galaxies left them millions of years ago, and in the case of the most distant object that we have seen, the light left some eight thousand million years ago. Thus, when we look at the universe, we are seeing it as it was in the past.

Tiap kali percobaan baru memberi hasil yang cocok dengan prediksi, teori harus bertahan, dan keyakinan kita terhadapnya meningkat; tapi jika ada pengamatan baru yang didapati tak cocok, kita harus tinggalkan atau ubah teori itu.

Tapi kita selalu bisa mempertanyakan kompetensi orang yang melakukan pengamatan.

one can never be too sure of an idea until it is tested against nature.

Propria noastr? existen?? impune reguli care determin? din ce loc È™i din ce moment avem posibilitatea s? observ?m universul. Altfel spus, existenÈ›a noastr? restricÈ›ioneaz? caracteristicile acelui tip de mediu în care ne afl?m.

In general relativity, bodies always follow straight lines in four-dimensional space-time, but they nevertheless appear to us to move along curved paths in our three-dimensional space. (This is rather like watching an airplane flying over hilly ground. Although it follows a straight line in three-dimensional space, its shadow follows a curved path on the two-dimensional ground.)

Noi cre?m istoria prin observa?iile noastre, iar nu istoria ne creeaz? pe noi.

Când analiz?m mai atent felul în care ne facem observaÈ›iile È™i ne construim concepte despre ceea ce ne înconjoar?, ajugem s? ne întreb?m dac? avem motive întemeiate s? credem c? exist? o realitate obiectiv?.

Cada vez que observamos novos experimentos coincidirem com as previsões, a teoria sobrevive e nossa confiança nela aumenta; porém, se em algum momento uma nova observação a contradiz, temos de abandonar a teoria ou modificá-la. Pelo

Our modern picture of the universe dates back to only 1924, when the American astronomer Edwin Hubble demonstrated that ours was not the only galaxy.

Thus the very fact that we exist as beings that can ask the question "Why is the universe the way it is?" is a restriction on the history we live in. It implies it is one of the minority of histories that have galaxies and stars. This is an example of what is called the Anthropic Principle. The Anthropic Principle says that the universe has to be more or less as we see it, because if it were different there wouldn't be anyone here to observe it.

Kita jelas tak bisa memprediksi peristiwa masa depan dengan tepat jika tak bisa mengukur keadaan alam semesta sekarang dengan tepat! Kita masih dapat membayangkan ada set hukum yang mengatur peristiwa sepenuhnya bagi suatu sosok supranatural, yang dapat mengamati keadaan semesta sekarang tanpa mengganggu.

por completa que sea nuestra observación del presente, el pasado (no observado) y el futuro son indefinidos y sólo existen como un espectro de posibilidades.