If you have read the previous post on The Three Pole Trick, you will know what I’m about to say. If you haven’t read it, I would suggest you do – to get a better understanding of this article.
In light of our technology here is an easy experiment to demonstrate to others if there is a curve to the earth or not. Go to an area of the country where there is a flat land, such as the beach. Say, you live in Kansas – which is a flat state. Set up three poles of equal height spaced a mile apart along the road. Do this when it’s dark or nearly so. Stand with a laser pointing across the tops of the poles. Have another person standing a mile or two way – off at right angles to the flags and have binoculars or a small power telescope to look at the light. If everything is lined up, you’ll see the line of the laser straight as an arrow across the poles. No pole will be higher than the other. As we know a laser beam is straight, and it’s something you can see at night. Get a photograph of this and write down the details.
If the earth is a globe, there would be the laser light 8 inches higher than pole B and 32 inches (2 feet 8 inches) higher than pole C.
While you are at it, if you start the experiment during the day, you can take a picture through the telescope at pole B and C, and you’ll see right to the very ground. This would be impossible on a globe, as at 2 miles you would not be able to see 2 feet inches of the bottom of the pole.
Another simple thing to do is, look at the laser light along the two miles and see if it’s parallel to the ground. Of course, you will just have to eye it, but you should be able to notice a difference of over two feet. If you can get to a site that covers a wider area and if you have a powerful enough laser, you can make the test over a longer area. In other words, IF the earth is a globe, the laser light will be at a higher elevation on the far end.