Contents

- 1 Can you see 100 miles away?
- 2 How far away can you see a ship at sea?
- 3 How far can you see before the curve of the earth?
- 4 How far can you see from 1 mile up?
- 5 How far can a human walk in a day?
- 6 How far can the human eye see a light?
- 7 How far out to sea can you see land?
- 8 Is the Ocean Flat?
- 9 How far can the human eye see on a mountain?
- 10 Can you see earth curvature from Everest?
- 11 Where in the world can you see the farthest?
- 12 Is it possible to see the curvature of the earth?
- 13 How far can a 6 foot man see at sea level?
- 14 How far away can you see a plane?
- 15 How far can you see at 400 feet?

## 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 away can you see a ship at sea?

Assuming a clear day, you can actually see another ship breach the horizon about **12 miles** away (19.3 kilometres or 10.4 nautical miles).

## 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 from 1 mile up?

Earth’s curvature

The Earth curves about 8 inches per mile. As a result, on a flat surface with your eyes 5 **feet** or so off the ground, the farthest edge that you can see is about 3 miles away.

## 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 out to sea can you see land?

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).

## Is the Ocean Flat?

Most people are surprised to learn that, just as the surface of the Earth is not **flat**, the surface of the **ocean** is not **flat**, and that the surface of the **sea** changes at different rates around the globe. For instance, the absolute water level height is higher along the West Coast of the United States than the East Coast.

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

Often, the curvature of the Earth gets in the way first. For example, at sea level, the horizon is only 4.8 kilometres (2.9 miles) away. On the top of Mt Everest, you **could** theoretically **see** for 339 kilometres (211 miles), but in practice clouds get in the way. For a truly unobstructed **view**, though, look up.

## 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.

## Where in the world can you see the farthest?

The **furthest** photographed sightline in the **world** is 443 km, from Pic de Finestrelles in the Spanish Pyrenees to Pic Gaspard in the French Alps, almost 100x further than what **can be seen** driving along the prairies and staring at the horizon.

## Is it possible to see the curvature of the earth?

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 can a 6 foot man see at sea level?

For a six-foot tall person, the horizon is a little more than **3 miles** (**5 km**) away. Geometry tells us that the distance of the horizon – i.e. the farthest point the eye can see before Earth curves out beneath our view – depends simply on the height of the observer.

## How far away can you see a plane?

So, **how far can you see** from a **plane**? Here is the theoretical **distance you can see** from a **plane** at different altitudes, given perfect weather conditions: at 1000 feet: 38.7 Miles (62km) at 5,000 feet: 86.6 Miles (140 km)

## How far can you see at 400 feet?

**If you** are on a light house at 200 **feet** above the sea level the horizon is at a **distance** of 17.3 statute miles.

Tabel: **Distance** to Horizon (height in **feet** and **distance** in statute miles)

Height [feet] |
Distance Horizon [miles] |
---|---|

200 | 17,3 |

300 | 21,2 |

400 |
24,5 |

500 | 27,4 |