Table of Contents
At what height can you see the horizon?
For instance, in standard atmospheric conditions, for an observer with eye level above sea level by 1.70 metres (5 ft 7 in), the horizon is at a distance of about 5 kilometres (3.1 mi).
How far can the eye see on the ocean?
At sea level the curvature of the earth limits the range of vision to 2.9 miles. The formula for determining how many miles an individual can see at higher levels is the square root of his altitude times 1.225.
How far can humans hear?
The normal intelligible outdoor range of the male human voice in still air is 180 m (590 ft 6.6 in). The silbo, the whistled language of the Spanish-speaking inhabitants of the Canary Island of La Gomera, is intelligible under ideal conditions at 8 km (5 miles).
What is the loudest sound made by man?
The loudest sound ever created by humans, not by natural causes, was said to be the atomic bomb blasts over Nagasaki and Hiroshima. Those clocked in at around 250 decibels. NASA’s highest recorded decibel reading was 204 and that was the first stage of the Saturn V rocket.
How far away can you see the curvature of the Earth?
For a six-foot-tall person, the curvature is approximately 3 miles away. This is a geometrical finding since the human eye cannot see a 24-inch curve from 3 miles away. Studies place the threshold altitude for seeing Earth’s curvature at about 35,000 feet.
How far away can you see the Earth?
From just 3 meters (10 feet) above the surface, you can see the horizon 6.2 km (3.85 mi) apart. If you’re 30 meters (100 feet) high, you’ll be able to see up to 20 km (12.5 mi) away. This is one of the reasons why, at least from the sixth century BC, ancient civilizations understood that the Earth was curved, not flat.
How high up can you see a curve in the sky?
You should be able to detect it from an aeroplane at a cruising height of around 10,600 metres (35,000 feet), but you need a fairly wide field of view (ie 60 degrees) and a virtually cloud-free horizon. The reality is that clouds, hills and mountains mean we rarely get to see the kind of perfectly flat horizon where the curve would be most obvious.
Is it possible to see the earth’s curvature from Mount Everest?
On a clear day, it is possible to see such a distance, but 230 miles is not enough for the human eye to discern an expansive curvature like that of the Earth. It is, therefore, possible to see the horizon from the top of Mount Everest but not Earth’s curvature. If we consider the effect of refraction, the horizon appears even further.