Gravitational Field



Gravitational field strength on Earth

Gravitational field strength on Earth

December 12, 2019

A field is something that has a magnitude and a direction at every point in space. Gravity is a good example - we know there is an…

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Gravitational field formula

Gravitational field formula

August 20, 2019

The Schwarzschild radius (sometimes historically referred to as the gravitational radius ) is the radius of a sphere such that, if…

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Higgs field and gravity

Higgs field and gravity

August 4, 2019

One of the questions I get most often from my readers is this: Since gravity pulls on things proportional to their mass, and since…

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Gravitational Fields

Gravitational Fields

July 27, 2019

To begin with, the speed of gravity has not been measured directly in the laboratory—the gravitational interaction is too weak, and…

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What is gravitational field?

What is gravitational field?

June 18, 2017

For irregular, nonspherical mass distributions in three dimensions, Newton’s original vector equation (4) is inefficient, though theoretically…

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What is the relativity theory?

What is the relativity theory?

January 13, 2017

Relativity is one of the most famous scientific theories of the 20th century, but how well does it explain the things we see in our…

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Gravitational field Lines

Gravitational field Lines

November 7, 2014

This episode introduces the notion of a field of force and how we can diagrammatically represent such a field using field lines…

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Earth gravitational field strength

Earth gravitational field strength

May 24, 2015

The geoid is a hypothetical Earth surface that represents the mean sea level in the absence of winds, currents, and most tides. The…

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