How do you determine the distance of an inaccessible object?

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How do you determine the distance of an inaccessible object?

2007-03-05 12:45:26 · 3 answers · asked by ROBERT P 7 in Science & Mathematics ➔ Geography

3 answers

That depends how far it is. Triangulation from two locations a known distance apart (you have the base of a triangle and two angles) has been used for hundred of years.

2007-03-05 12:51:37 · answer #1 · answered by Vincent G 7 · 0⤊ 0⤋

Dopler effect.

2007-03-05 12:58:05 · answer #2 · answered by rico3151 6 · 0⤊ 0⤋

echo location,light reflection distance detection.

2007-03-05 13:51:27 · answer #3 · answered by slipstream 7 · 0⤊ 0⤋