100 Miles Compared to Earth Radius
241 views · Published 14 January 2016 · 1:21 · Indexed 30 September 2026
Channel: Terry Badger · 2016 · Science & Technology
This is a series of screen shots taken while creating a true to scale (accurate within 100,000th of a unit inch) 100 Miles Compared to Earth Radius. I will annotate what is going on in bubbles later. The slides are fuzzy but here ... @ 0:03 is the measuring of the circle SUN ≈ diameter 864,948 miles @ 0:08 is the measuring of the Earth ≈ diameter 7,918 miles @ 0:12 the Moon ≈ diameter 2,158 miles @ 0:17 the diameter of Earth at 7,918 I draw a line @ 0:23 I drew a line 100 miles long @ 0:27 moved it tangent to the Earth circle @ 0:33 I had moved the 100 mile line back away from the Earth and then drew a 4,000 mile line perfectly tangent to the Earth for perfect East @ 0:38 measuring it for 4,000 @ 0:41 copied a Google snap of Lake Michigan, in part, but at a 5 mile per sector ratio @ 0:47 inserted that in the CAD drawing @ 0:53 I made a line that matched as best I can by eye the legend 5 Mile distance which is just under 227 miles ... this is just to show what can be done later; I will scale it all to view, but not tonight @ 0:57 back to the line project, and this is 100 miles with an arc at the radius of 3,959 miles spanning the 100 miles which mathematically becomes a span of .3157 of a mile at center @ 1:00 you can see that span and I told it to halve that @ 1:06 the arc lays over the 100 mile line to go measure the distance at the ends, which is 1/2 of the span of course @ 1:12 that end gap is .1579 miles This tells me that in order to have the curvature of the water in a lake that is basically calm, there is 833 feet leeway on both sides that a laser could be set up and leveled to Earth and not ever runs a chance of being read by the laser reader 100 miles away. What is all this for? With this information I can tell you every lake on the planet to which you can take a laser surveyor and place it 1-2 feet off the water on one side of the lake and you can't get a signal across the lake to the 1-2 foot reader off the water level on the other side. There are 1,000s ... if we lower the laser reader set down to half a foot I would bet there are 10,000s of lakes the curvature of the water will block the laser. Terry Badger
