Thursday

March 5, 2015

March 5, 2015

Posted by **parker** on Thursday, February 3, 2011 at 7:44pm.

- surveying -
**MathMate**, Friday, February 4, 2011 at 8:13amThe distance D to the horizon in km by an observer at H m from the ground is given approximately by

D=3.56√H

The visible distance between two objects at H1 and H2 away from (the same) horizon is thus given by the sum of the distances, namely:

D=3.56(√H1+√H2)

=14.83 km.

See

http://en.wikipedia.org/wiki/Horizon

Follow the derivation of the formula to understand the geometry behind it.

**Answer this Question**

**Related Questions**

Physics guide me through - On a calm, bright day, you're scuba diving in a deep ...

Physics - On a calm, bright day, you're scuba diving in a deep lake (n = 1.33), ...

Physics - A) On a calm, bright day, you're scuba diving in a deep lake (n = 1....

physics (last problem)help - On a calm, bright day, you're scuba diving in a ...

physics - On a calm, bright day, you're scuba diving in a deep lake (n = 1.33), ...

physics - On a calm, bright day, you're scuba diving in a deep lake (n = 1.33), ...

physics - A sailboat is sailing north on a lake parallel to the shore with a ...

Calculus - Spud McTator climbs his sailboat's mast while anchored. He fires his...

Math - An object is 6m away from the base of a mast. The angle of depression of ...

math - The mast of a sailing ship is 20 ft tall. A rope is streched 26 ft from ...