Tuesday, 19 June 2007
A little mathematical nonsense to see me past tomorrow's exam.
The Earth, lovely thing that it is, is 24,880 miles (40,041km) in circumference.
That's 131,369,652 feet.
Now, imagine a ribbon going right around the earth, fitting neatly to the surface. (Yes, I know all about the mountains, valleys, trees and stuff. Just imagine it for the moment and forget the lumpy bits.). So this ribbon is 131,369,652 feet long.
Now, lets cut the ribbon and put in one more foot of ribbon and then go around and make sure the new ribbon is evenly adjusted around the globe. 131,369,653 feet of ribbon.
How far away from the surface will this ribbon be?
Can you see light between the ground and the ribbon?
Can you slip a piece of paper between them?
How about a cockroach passing through the gap? A mouse? A cat? A goat?
Answer tomorrow in the comments section.