Most of us first learned about gravity in school through the famous story of Isaac Newton sitting beneath a tree when an apple fell on his head.
The story says that Newton began to wonder why the apple fell downward instead of moving in some other direction.
Over time, he made great progress and eventually expressed this force through a well-established mathematical formula.
According to this formula, any two objects anywhere in the universe exert a gravitational pull on each other.
One, the greater the mass of the objects, the stronger the gr-gravitational force between them.
Two, the greater the distance between the objects, the weaker the force becomes.
Even when objects are very far apart, the gravitational force still exists, but it becomes so small that it is almost negligible.
Newton discovered the formula for gravity, but he still did not understand how the force actually worked.
Why should two objects separated by distance try to pull each other closer? What connects them? Is there some invisible string joining one object to another? Newton considered these questions carefully, but he was unable to answer them fully.
We experience the force of gravity everywhere, yet our understanding of how it functions remains limited.
Physicists propose that gravity may be mediated by a force particle called the graviton.
This particle is known in theory, but the graviton itself has not yet been discovered.
At the end of this episode, we will suggest where the graviton particles might be found and how they may function.
Most of us first learned about gravity in school through the famous story of Isaac Newton sitting beneath a tree when an apple fell on his head.
The story says that Newton began to wonder why the apple fell downward instead of moving in some other direction.
Over time, he made great progress and eventually expressed this force through a well-established mathematical formula.
According to this formula, any two objects anywhere in the universe exert a gravitational pull on each other.
One, the greater the mass of the objects, the stronger the gr-gravitational force between them.
Two, the greater the distance between the objects, the weaker the force becomes.
Even when objects are very far apart, the gravitational force still exists, but it becomes so small that it is almost negligible.
Newton discovered the formula for gravity, but he still did not understand how the force actually worked.
Why should two objects separated by distance try to pull each other closer? What connects them? Is there some invisible string joining one object to another? Newton considered these questions carefully, but he was unable to answer them fully.
We experience the force of gravity everywhere, yet our understanding of how it functions remains limited.
Physicists propose that gravity may be mediated by a force particle called the graviton.
This particle is known in theory, but the graviton itself has not yet been discovered.
At the end of this episode, we will suggest where the graviton particles might be found and how they may function.
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