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Geography/Curvature of the Earth

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Question
On a straight line, on a level highway (or at sea) how far can one see because of the curvature of the earth?

Answer
Basic distance to horizon
Basic distance to hori  

Exact distance to objects on the horizon
Exact distance to obje  
Hi there,

On a very large pure sphere a small creature can only see a distance a few times its height! Height in comparison to diameter or radius of the sphere is what determines how much of the sphere is visible. Example, an eyeball or ant floating on calm waters of a lake will only see a distance of a few metres and a person standing above a soccerball will see HALF of it but only about a foot of circumference.

There is a basic calculation for the distance to the horizon: d = squareroot of (13000 x height) ....so, looking straight on a calm sea from a height of about two meters, like standing on the beach, one will see about 5 kilometers.

Regards
RRG

Geography

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