All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info

Home > Shapes > Geometry
I See No More Ships (Posted on 2006-01-29) Difficulty: 4 of 5
For an observer at height h above the surface of the Earth,

i) What area, A, of the Earth's surface is visible?
ii) At what altitude, h, does the curvature of the Earth become apparent?

You may assume one can detect, with the human eye, an angle of one degree between the two ends of a line (i.e. two tangents at either end of the visible horizon, appear to intersect at an angle of one degree), that the average human field of view is 180°, also that the Earth is a sphere of radius 6378 km, or you may provide your own figures for the calculations.

No Solution Yet Submitted by Sir Percivale    
Rating: 4.5000 (2 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
re(2): discussionCharlie2006-01-30 09:25:45
re: discussionAdy TZIDON2006-01-30 02:28:52
Some Thoughtsre: discussionLeming2006-01-29 17:36:51
SolutionSolution with some triviaLeming2006-01-29 16:12:33
SolutiondiscussionCharlie2006-01-29 15:18:13
Please log in:
Remember me:
Sign up! | Forgot password

Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (2)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Copyright © 2002 - 2019 by Animus Pactum Consulting. All rights reserved. Privacy Information