Geht doch bei gutem Wetter selbst mal an den Strand. Vielleicht mit einer guten Zoom-Kamera.
Bei sehr kaltem und guten Wetter kann jeder nach links und rechts 50 km weit sehen. Man überblickt also einen Bereich von 100 Km. Warum gibt es da keine Krümmung? Gilt die Krümmung nur, wenn sich Schiffe entfernen?
Ha ha, geil :-)
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