If a laser beam hit point Q at a distance greater than one mile then the earth is flat Here is the laser experiment but another way (not close to the surface of the water) Someone removed his post in reference to laser experiment. We need extra reinforcement (steel) in the lower portion of very high-rise building if the earth is round. If BD < AC then we can measure not only the correct curvature of earth but also its radius via geometry as shown in the figure If BD = AC then the earth is flat – case closed Measure AB, BD, DC, and AC with modern equipment of engineering survey Two stable helicopters or hot air balloons at height A and C can also be used instead of high-rise vertical structures.Īn object x falls and strikes at B if drops from height A, similarlyĪn object x falls and strikes at D if drops from height Cī and D can be found via a continuous laser beam from A to B and C to D respectively Height of AB = CD and length AC and BD must conspicuous (say at least one limes) for curvature Let AB and CD are the two high-rise vertical structures. The world's longest and highest continuous bridges over land or water might help in finding AC and BD Using the Pythagorean theorem, that calculates to an average curvature of 7.98 inches per mile or approximately 8 inches per mile (squared) – source InternetĪBDC is a continuous structure – we haven’t reached at that level so just ignore it The Earth has a radius of approximately 3965 miles.
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