Rule of Thumb

REACHING THE HORIZON

The distance to the horizon, in miles, is the square root of half again your height, in feet. If you’re ...

The distance to the horizon, in miles, is the square root of half again your height, in feet. If you’re 6 feet tall, you can see 3 miles. From 600 feet, you can see 30 miles (sq. rt. of 900). Conversely, you can see a 150-foot building from 15 miles away (sq. rt. of 225). — Dani Zweig, Pittsburg, Pennsylvania

12/18/16