How far is the horizon at sea level for a person 1.5 meters tall?

The distance to the horizon for a person 1.5 meters tall at sea level can be calculated using the formula:

Distance to horizon (in kilometers) = √(Height of observer's eye in meters * 13.89)

In this case, the height of the observer's eye is 1.5 meters. Substituting this value into the formula, we get:

Distance to horizon = √(1.5 * 13.89) = √(20.835) ≈ 4.56 kilometers

Therefore, the horizon for a person 1.5 meters tall at sea level is approximately 4.56 kilometers away.