Measure Earth's Circumference with a Shadow

Measure Earth's Circumference with a Shadow | Scientific American

The earth is massive, but you don't need a massive ruler to measure its size. All you need are a few household items--and little bit of geometry!

5.4: Measuring the Earth with Eratosthenes - Physics LibreTexts

His method was very simple: he measured the angle made by a shadow cast from a vertical stick in two different cities on the same day and time.

Measure the Earth's Circumference with a Shadow | STEM Activity

In this project, you will do this calculation yourself by measuring the angle formed by a meter stick's shadow at your location.

Measuring Shadows to Calculate the Size of Earth - NSTA

The answer is 360°/10° = 36. This tells us that Earth's circumference is simply equal to 36 times the distance between the pair of trees! When the shadows of ...

Measure the Circumference of the Earth - NASA/ADS

He multiplied by 800 km to 50 and calculated that the Earth's circumference is 40,000 km. The "Measuring the Earth's Circumference " activity allows students in ...

Eratosthenes measured the circumference of the Earth by ... - Quora

Eratosthenes measured the circumference of the Earth by measuring the shadow of two poles, miles apart, at the exact same time. How did he know ...

The Eratosthenes experiment: calculating the Earth's circumference

Students can measure the Earth's circumference like Eratosthenes did approximately 2300 years ago using simple materials and a stick's shadow made by the Sun.

How Eratosthenes calculated the Earth's circumference - YouTube

In the mid-20th century we began launching satellites into space that would help us determine the exact circumference of the Earth: 40030 km ...

How to Measure the Size of Earth with a Stick | Plateau Astro

In short, if you were to be at the Equator on the Equinox at solar noon, the Sun would be directly overhead. No shadow would be cast from object ...

Shadows can help measure Earth's circumference ... - Facebook

Shadows can help measure Earth's circumference! 2200 years ago, Greek mathematician Eratosthenes used this clever method.

Measuring the circumference of the earth - revisited

To get the circumference of a great circle and thus the Earth, you need to divide the calculated number above by the cosine of your latitude. To ...

Measuring Earth's Circumference with a Ruler - Lectrobox

At noon on the next Solstice, Eratosthenes measured the shadow cast by a vertical pillar in Alexandria to be 7° away from vertical. He knew that at the same ...

Calculating The Circumference of The Earth - YouTube

I read about how Eratosthenes calculated the circumference of the Earth and I knew that I had to try it myself.

Eratosthenes: The Size of the Earth - CooperToons

Eratosthenes realized the reason the shadows were of different lengths was due to the curvature of the Earth. Eratosthenes figured that from the difference in ...

Experiment of The Month | Millersville University

In our case, the shadows tell us that we have moved about 10 degrees around the earth when travelling from Florida to Pennsylvania. Since the distance travelled ...

Earth's circumference - Wikipedia

Earth's circumference is the distance around Earth. Measured around the equator, it is 40,075.017 km (24,901.461 mi). Measured passing through the poles, ...

Calculating the Circumference of the Earth | Science Project

You can use Eratosthenes' method to calculate the circumference of the earth yourself. You can even make the calculation when the sun casts a shadow at noon in ...

Shadows can help measure Earth's circumference! - YouTube

2200 years ago, Greek mathematician Eratosthenes used this clever method. By measuring shadow lengths in two cities 794 km apart and ...

The History of Geodes: Global Positioning Tutorial

This illustration shows how Eratosthenes actually calculated the circumference of the Earth. At noon on the summer solstice, Eratosthenes measured the length of ...

How could we have measured the circumference of the earth without ...

In the story of Eratosthenes he measures the angle of the shadows in Alexandria and a servant measures the angle of the shadows in another ...