when you look over an unobstructed landscape or seascape, the distance to the visable horizon depends on your height above the ground. The equation is a good estimate of this, in which d=distance to horizon in miles and h=height of viewer above the ground, in feet.. It is possible to find different distances to the horizon given different elevations.

a.) solve the above equation for height h
b.) can you see an object that is a 100 miles away from the top of Empire state building?
c.) Long's peak in Rocky Mountain National Park, is 14,255 feet in elevation. How far can you see to the horizon from the top of Long's peak? Can you see Cheyenne, Wyoming(about 89 miles away)? Explain your answer.

exactly what equation?