## Philosophy Lexicon of Arguments | |||

Author | Item | Excerpt | Meta data |
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Feynman, Richard Books on Amazon |
Ontology | I 246 Ontology/Feynman: The "reality" of an object is a little bigger (roughly and intuitively spoken) than its "width" and "depth", because they depend on how we look at it. Relativity theory: our brain has never had any experiences with speed close to c so that we could not integrate any experience, of the type that time and space are of the same kind. It is as if we could always stand in a position and not turn in the other direction. If we could, we would see a little of the other man's time. We would "look back" a little. Space-Time/Feynman: In a world where space and time are "mixed" (this is actually our world, seen close to speed of light), objects are more like a kind of "blob", viewed from different perspectives when we move at different speeds. I 247 Measuring/Geometry/Feynman: there are properties which are independent of the particular type of measurement. For example, the distance between two points in a rotated coordinate system when one of the two points is in the origin. The square of the distance is x² + y² + z². What about space-time? Space-Time/Geometry/Feynman: it is easy to show that there is also an invariance here: I 248 The combination c²t² x² y² z² is the same before and after the transformation: c²t' ² x' ² y' ² z' ² = c²t² x² y² z². ( 17.3?) Ontology/Feynman: this quantity is something that is "real" like the distance in a sense. It is called the Def "interval" between two spacetime points. I 448 Existence/Ontology/Feynman: if the polarization changes faster than we can measure it, we call it light. This is unpolarized, because all polarization effects are eliminated. |
Fey R. Feynman Vom Wesen physikalischer Gesetze München 1993 Fey I R. Feynman Vorlesungen über Physik I München 2001 |

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Ed. Martin Schulz, access date 2017-04-29