Zitat von
Opie_SOA
Danke, das sind endlich mal vernünftige Erklärungen
Gibt es auch Erklärungen für das Bedord Experiment (ab etwa 26:45) und dafür, dass weit entfernte Objekte nicht nach hinten geneigt scheinen?
das Bedford Experiement wurde mit anderem Ausgang wiederholt:
In 1901, Henry Yule Oldham, a geography reader at King's College, Cambridge, reproduced Wallace's results using three poles fixed at equal height above water level. When viewed through a theodolite (a precision instrument for measuring angles), the middle pole was found to be almost three feet (0.91 m) higher than the poles at each end.[10][11] This version of the experiment was taught in schools until photographs of the Earth from space became available.[12][13]
Die Tatsache, dass man mal mehr und mal weniger sieht, könnten darauf hindeuten, dass es vom Wetter abhängt:
The photographer, Edgar Clifton from Dallmeyer's studio, mounted his camera two feet above the water at Welney and was surprised to be able to obtain a picture of the target, which should have been invisible to him given the low mounting point of the camera. Lady Blount published the pictures far and wide.[14]
These controversies became a regular feature in the English Mechanic magazine in 1904–5, which published Blount's photo and reported two experiments in 1905 that showed the opposite results. One of these, by Clement Stratton on the Ashby Canal, showed a dip on a sight-line only above the surface.
[...]
An increase in air temperature or lapse rate of 0.11 degrees Celsius per metre of altitude would create an illusion of a flat canal, and all optical measurements made near ground level would be consistent with a completely flat surface. If the lapse rate were higher than this (temperature increasing with height at a greater rate), all optical observations would be consistent with a concave surface, a "bowl-shaped earth". Under average conditions, optical measurements are consistent with a spherical Earth approximately 15% less curved than its true diameter.[18] Repetition of the atmospheric conditions required for each of the many observations is not unlikely, and warm days over still water can produce favourable conditions.[19]
https://en.wikipedia.org/wiki/Bedford_Level_experiment
Bezüglich der geneigten Gebäude, hier ein Zitat aus dem Wikipedia-Eintrag zur Verrazano-Narrows Bridge:
Die 211 m hohen Pylone stehen auf mit Granit verkleideten Betonfundamenten, die 32 bzw. 52 m tief in den Untergrund reichen. Bedingt durch die Erdkrümmung und die große Spannweite von 1298 m haben die Pylone an der Spitze einen ca. 4 cm größeren Abstand als an der Basis
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