## How does relativity explain gravity?

## How does relativity explain gravity?

GETTING A GRIP ON GRAVITY Einstein’s general theory of relativity explains gravity as a distortion of space (or more precisely, spacetime) caused by the presence of matter or energy. A massive object generates a gravitational field by warping the geometry of the surrounding spacetime.

**Why does gravity warp time?**

Gravitational time dilation occurs because objects with a lot of mass create a strong gravitational field. The gravitational field is really a curving of space and time. The stronger the gravity, the more spacetime curves, and the slower time itself proceeds.

**Why does gravity pull us down?**

In 1915, Albert Einstein figured out the answer when he published his theory of general relativity. The reason gravity pulls you toward the ground is that all objects with mass, like our Earth, actually bend and curve the fabric of the universe, called spacetime. That curvature is what you feel as gravity.

### Why does gravity bend space?

Large objects such as the Sun and planets aren’t the only masses that warp the fabric of space-time. Anything with mass—including your body—bends this four-dimensional cosmic grid. The warp, in turn, creates the effect of gravity, redirecting the path of objects that travel into it.

**Why do objects fall if gravity is not a force?**

This equivalence between floating and falling is what Einstein used to develop his theory. In general relativity, gravity is not a force between masses. Instead gravity is an effect of the warping of space and time in the presence of mass. Without a force acting upon it, an object will move in a straight line.

**Why does gravity travel at the speed of light?**

The speed of those ripples is determined the same way the speed of anything is determined in relativity: by their energy and their mass. Since gravitational waves are massless yet have a finite energy, they must move at the speed of light!

#### Why does gravity affect time?

**What is the formula for the theory of relativity?**

m nuc is the mass of the nucleus. The mass energy is equivalent, according to Einstein’s theory of relativity. That is, the total energy of a system is measured by its mass. E=mc2 is a well-known equation. As a result, the nucleus’ overall energy is smaller than the sum of the energies of individual protons and neutrons (nucleons).

**What is wrong with the theory of relativity?**

There is no evidence for such a fabric existing in the real physical world and no theory of what it is made of or how that guidance of masses works. GR denies that gravity is a force. That is obviously wrong. Special relativity claims that reality depends on the frame of reference from which it is observed. That is wrong.

## What are the major implications of the theory of relativity?

A person ‘a’ will receive light from A,B,C,D at same time will conclude that all bursts occurred at same time.

**How to study the theory of relativity?**

Learn basic vector algebra and calculus (skip this one if you already have a solid understanding of high school level physics).