Обзор документального фильма "Terra Convexa" (Выпуклая Земля)

Distance Curvature1 km 0.00008 km = 0.08 meters2 km 0.00031 km = 0.31 meters5 km 0.00196 km = 1.96 meters10 km 0.00785 km = 7.85 meters20 km 0.03139 km = 31.39 meters50 km 0.19620 km = 196.20 meters100 km 0.78479 km = 784.79 meters200 km 3.13897 km = 3138.97 meters500 km 19.6101 km = 19610.09 meters1000 km 78.3196 km = 78319.62 metersExplanation:The Earth's radius (r) is 6371 km or 3959 miles, based on numbers from Wikipedia,which gives a circumference (c)of c = 2 * π * r = 40 030 kmWe wish to find the height which is the drop in curvature over the distance Using the circumference we find that 1 kilometer has the angle360° / 40 030 km = 0.009°. The angle (a) is then a = 0.009° * distance The derived formula h = r * (1 - cos a) is accurate for any distance

они это давно знают