FOREWORD by Albert Einstein
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If two different authors use the words "red," "hard," or "disappointed," no one doubts that they mean approximately the same thing, because these words are connected with elementary experiences in a manner which is difficult to misinterpret. But in the case of words such as "place" or "space", whose relation with psychological experience is less direct, there exists a far-reaching uncertainty of interpretation.
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( e alla fine conclude )
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1) If the laws of this field are in general covariant, that is, are not dependent on a particular choice of coordinate system, then the introduction of an independent (absolute) space is no longer necessary.
2) ( e quindi ) That which constitutes the spatial character of reality is then simply the four-dimensionality of the field. There is then no "empty" space, that is, there is no space without a field.
Albert Einstein Princeton 1953 ( un anno prima di morire )
Nota: quindi non è che nello spazio c'è il campo, ma il campo è quello che fisicamente chiamiamo spazio. Quando si pensa a un elettrone in uno spazio vuoto, è sbagliato: l'elettrone è in un campo elettrico ed in uno gravitazionale.
.........
If two different authors use the words "red," "hard," or "disappointed," no one doubts that they mean approximately the same thing, because these words are connected with elementary experiences in a manner which is difficult to misinterpret. But in the case of words such as "place" or "space", whose relation with psychological experience is less direct, there exists a far-reaching uncertainty of interpretation.
....
( e alla fine conclude )
.....
1) If the laws of this field are in general covariant, that is, are not dependent on a particular choice of coordinate system, then the introduction of an independent (absolute) space is no longer necessary.
2) ( e quindi ) That which constitutes the spatial character of reality is then simply the four-dimensionality of the field. There is then no "empty" space, that is, there is no space without a field.
Albert Einstein Princeton 1953 ( un anno prima di morire )
Nota: quindi non è che nello spazio c'è il campo, ma il campo è quello che fisicamente chiamiamo spazio. Quando si pensa a un elettrone in uno spazio vuoto, è sbagliato: l'elettrone è in un campo elettrico ed in uno gravitazionale.
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