 # Quick Answer: How Did Einstein Explain Gravity?

## Who found out about gravity?

Sir Isaac NewtonSir Isaac Newton was an English mathematician and mathematician and physicist who lived from 1642-1727.

The legend is that Newton discovered Gravity when he saw a falling apple while thinking about the forces of nature..

## Why don’t we fall through the earth?

The reason is that the gravity of earth keeps up on the surface of the earth. … Because there is a huge power inside the earth and it makes us stick to it, but we are so strong that we can move, but we can’t fall.

## How was E mc2 proven?

It’s taken more than a century, but Einstein’s celebrated formula e=mc2 has finally been corroborated, thanks to a heroic computational effort by French, German and Hungarian physicists. … The e=mc2 formula shows that mass can be converted into energy, and energy can be converted into mass.

## What did Einstein say about gravity?

Gravity is most accurately described by the general theory of relativity (proposed by Albert Einstein in 1915), which describes gravity not as a force, but as a consequence of masses moving “straight ahead” in a curved spacetime caused by the uneven distribution of mass.

## What does E mc2 mean in simple terms?

E = mc2. It’s the world’s most famous equation, but what does it really mean? “Energy equals mass times the speed of light squared.” On the most basic level, the equation says that energy and mass (matter) are interchangeable; they are different forms of the same thing.

## Where is gravity the strongest?

sea levelThe force of gravity is stronger at sea level. The gravitational force, as explained by Newton’s Law of Gravitation, is inversely proportional to the square of the separation between the two masses (or the separation between the centers of mass for the two objects).

## How do we use E mc2 today?

They are metamorphosing mass into energy in direct accordance with Einstein’s equation. We take advantage of that realization today in many technologies. PET scans and similar diagnostics used in hospitals, for example, make use of E = mc2.

## What causes gravity on earth simple answer?

The answer is gravity: an invisible force that pulls objects toward each other. … So, the closer objects are to each other, the stronger their gravitational pull is. Earth’s gravity comes from all its mass. All its mass makes a combined gravitational pull on all the mass in your body.

## Why is there no gravity in space?

The second reason that gravity is not so obvious in space is because objects tend to orbit planets instead of hitting them. Orbiting just means that an object falls towards a planet due to gravity and continually misses it. … Astronauts in orbit around the earth are not experiencing “no gravity”.

## Why is C Squared?

Just because there is a c in the formula for rest mass energy does not mean that the particle has that speed. It turns out that the speed of light squared, c 2 , just so happens to be the conversion factor from mass to energy.

## What is gravity made of?

They proposed that gravity is actually made of quantum particles, which they called “gravitons.” Anywhere there is gravity, there would be gravitons: on earth, in solar systems, and most importantly in the miniscule infant universe where quantum fluctuations of gravitons sprung up, bending pockets of this tiny space- …

## Why can light not escape from a black hole?

However, when gravity is very strong, the bending of light’s path becomes significant. A black hole is a region where spacetime is so curved that every possible path which light could take eventually curves and leads back inside the black hole. As a result, once a ray of light enters a black hole, it can never exit.

## How did Einstein change Newton’s idea of gravity?

Einstein’s Gravity Albert Einstein called gravity a distortion in the shape of space-time. … Newton’s theory says this can occur because of gravity, a force attracting those objects to one another or to a single, third object. Einstein also says this occurs due to gravity — but in his theory, gravity is not a force.

## Why is Einstein’s theory of gravity widely accepted today?

According to Einstein, objects move toward one another because of the curves in space-time, not because they are pulling on each other with a force of attraction. Einstein’s theory is supported by evidence and widely accepted today, although Newton’s law is still used for many calculations.

## Could anti gravity really be possible?

In the 20th century, Newton’s model was replaced by general relativity where gravity is not a force but the result of the geometry of spacetime. Under general relativity, anti-gravity is impossible except under contrived circumstances.