Contents

- 1 How far can you see before the curve of the earth?
- 2 How far can you see on the horizon on the ocean?
- 3 Can you see 100 miles away?
- 4 How far can you see on a clear day at sea?
- 5 How far can a human see another human?
- 6 Can you see earth curvature from Everest?
- 7 Why does the horizon look higher?
- 8 How deep can the ocean go?
- 9 How much does the earth curve per km?
- 10 How far can a human walk in a day?
- 11 How far can the human eye see a light?
- 12 How far can the human eye see a mountain?
- 13 Can you see the curvature of the earth from sea level?
- 14 How far away can a ship see a lighthouse?

## How far can you see before the curve of the earth?

Your visual curvature is limited to **about 5KM** (**3.3miles**) before the object you see on Earth will start appearing below the horizon.

## How far can you see on the horizon on the ocean?

For an observer standing on the ground with h = 2 **metres** (6 ft 7 in), the horizon is at a distance of 5 **kilometres** (3.1 mi). For an observer standing on a hill or tower 30 **metres** (98 ft) above sea level, the horizon is at a distance of 19.6 **kilometres** (**12.2 mi**).

## Can you see 100 miles away?

The Earth is round and **you** cannot **see 100 miles** out to sea from sea level. **If you** stand at the water’s edge and your eyes are 180 cm from the ground the horizon is about 4.8km or nearly 3 **miles away**. For the horizon to be **100 miles away** your eyes **would** have to be 1878 metres above the ground.

## How far can you see on a clear day at sea?

(Image credit: NOAA.) On a clear day, you can see for **miles** and **miles** and **miles**. The old saying turns out to be just about true. For a six-foot tall person, the horizon is a little more than **3 miles** (5 km) away.

## How far can a human see another human?

Based on the curve of the Earth: Standing on a flat surface with your eyes about 5 feet off the ground, the farthest edge that you can see is about **3 miles** away.

## Can you see earth curvature from Everest?

Even while on top of Mount **Everest**, it is impossible to **see** the **curvature**. Studies place the threshold to **see** the **curvature** at 35,000 feet, but even at this height, **one** must have at least a 60° angle of vision.

## Why does the horizon look higher?

At **higher** altitude, the **horizon** is at a **larger** angle to the near edge of the water. This is both an effect of perspective, and because you can see farther. When the apparent distance to the **horizon** is **larger**, your brain wants it to be **higher**, not farther away. Because you have to raise your eye line more to **look** at it.

## How deep can the ocean go?

The **deepest** part of the **ocean** is called the Challenger **Deep** and is located beneath the western Pacific **Ocean** in the southern end of the Mariana Trench, which runs several hundred kilometers southwest of the U.S. territorial island of Guam. Challenger **Deep** is approximately 36,200 feet **deep**.

## How much does the earth curve per km?

Earth Curvature Calculator

Distance | Curvature |
---|---|

1 km |
0.00008 km = 0.08 meters |

2 km |
0.00031 km = 0.31 meters |

5 km |
0.00196 km = 1.96 meters |

10 km |
0.00785 km = 7.85 meters |

## How far can a human walk in a day?

While your body is made for walking, the distance you can achieve at an average walking pace of **3.1 miles** per hour depends on whether you have trained for it or not. A trained walker can walk a 26.2-**mile** marathon in eight hours or less, or walk 20 to **30 miles** in a day.

## How far can the human eye see a light?

Considering the absolute threshold, the brightness of a candle flame, and the way a glowing object dims according to the square of the distance away from it, vision scientists conclude that one could make out the faint glimmer of a candle flame up to **30 miles** away.

## How far can the human eye see a mountain?

From a tall building on a clear day, you **can see mountains** as **far** away as about 100 miles.

## Can you see the curvature of the earth from sea level?

It is possible to **see** the effect of the **curvature of the earth from sea level** (ships disappearing over the horizon). To actually **see the curvature** directly (ie to be able to **see** the horizon as an arc, rather than a straight line) requires an altitude of over 50,000 feet.

## How far away can a ship see a lighthouse?

In lighthouse work the observer is always assumed to be at a height of 15 feet, although on large ships he may be 40 feet above the sea. Assuming a light at a height of 100 feet, the range to an observer at 15 feet above the horizon will be about 16 **nautical miles**. This is known as the geographic range of the light.