WizardofOz
New member
[MENTION=4980]DFT_Dave[/MENTION] and [MENTION=16629]patrick jane[/MENTION]
Another simple experiment you can do if you know someone who lives far enough away from you and also owns a phone (assuming you own a phone)
Perhaps the two of you could :idea: call each other and determine that the earth is not flat at the same time!
Another simple experiment you can do if you know someone who lives far enough away from you and also owns a phone (assuming you own a phone)
One of the best documented methods for determining the Earth's roundness was first performed (to our knowledge) by the ancient Greeks. This was achieved by comparing the shadows of sticks in different locations. When the sun was directly overhead in one place, the stick there cast no shadow. If the Earth were flat then both sticks should show the same shadow (or lack of) because they would be positioned at the same angle towards the sun. The ancient Greeks found the shadows were different because the Earth was curved and so the sticks were at different angles. They then used the difference in these angles to calculate the circumference of the Earth. They managed to get it to within 10% of the true value. |
Perhaps the two of you could :idea: call each other and determine that the earth is not flat at the same time!