Contents

- 1 What is the main idea of general relativity?
- 2 What was Einstein’s general theory?
- 3 What is general relativity for dummies?
- 4 Why is general relativity wrong?
- 5 Is E mc2 the theory of relativity?
- 6 What does E mc2 mean in simple terms?
- 7 Why is Einstein’s theory of relativity important?
- 8 What is E mc2 used for?
- 9 What is the difference between the two theories of relativity?
- 10 How hard is general relativity?
- 11 What is the conflict between general relativity and quantum mechanics?
- 12 What can move faster than light?

## What is the main idea of general relativity?

What is general relativity? Essentially, it’s a theory of gravity. The basic idea is that instead of being an invisible force that attracts objects to one another, gravity is a curving or warping of space. The more massive an object, the more it warps the space around it.

## What was Einstein’s general theory?

Einstein’s 1915 general theory of relativity holds that what we perceive as the force of gravity arises from the curvature of space and time. The scientist proposed that objects such as the sun and the Earth change this geometry.

## What is general relativity for dummies?

General relativity is a theory of space and time. The central idea of general relativity is that space and time are two aspects of spacetime. Spacetime is curved when there is matter, energy, and momentum resulting in what we perceive as gravity. The links between these forces are shown in the Einstein field equations.

## Why is general relativity wrong?

Yet most researchers think general relativity is wrong. incomplete. After all, the other forces of nature are governed by quantum physics; gravity alone has stubbornly resisted a quantum description. The fix is dark matter, particles invisible to light but endowed with gravity.

## Is E mc2 the theory of relativity?

The most famous equation in the world, E = mc^{2}, arrived rather quietly. In 1905, Einstein published two articles on the Special Theory of Relativity. Einstein went on to present his findings mathematically: energy ( E ) equals mass (m) times the speed of light (c) squared (^{2}), or E = mc^{2}.

## What does E mc2 mean in simple terms?

Einstein’s Big Idea homepage. E = mc^{2}. 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.

## Why is Einstein’s theory of relativity important?

The theory explains the behavior of objects in space and time, and it can be used to predict everything from the existence of black holes, to light bending due to gravity, to the behavior of the planet Mercury in its orbit. The implications of Einstein’s most famous theory are profound.

## What is E mc2 used for?

The equation — E = mc^{2} — means “energy equals mass times the speed of light squared.” It shows that energy ( E ) and mass (m) are interchangeable; they are different forms of the same thing. If mass is somehow totally converted into energy, it also shows how much energy would reside inside that mass: quite a lot.

## What is the difference between the two theories of relativity?

The “General Theory of Relativity ‘ is related to gravity. It describes gravitational force as continuous non-spatial whole of space and time. The difference between the two theories is that the theory of general relativity throws light on the force of gravity with respect to curving four-dimensional space-time.

## How hard is general relativity?

While relativity has a reputation for being intimidatingly difficult, it’s a peculiar kind of difficulty. Coming at the subject without any preparation, you hear all kinds of crazy things about time dilating and space stretching, and it seems all very recondite and baffling.

## What is the conflict between general relativity and quantum mechanics?

In theoretical physics, the problem of time is a conceptual conflict between general relativity and quantum mechanics in that quantum mechanics regards the flow of time as universal and absolute, whereas general relativity regards the flow of time as malleable and relative.

## What can move faster than light?

Tachyons are hypothetical particles that travel faster than light. According to Einstein’s special theory of relativity – and according to experiment so far – in our ‘real’ world, particles can never travel faster than light.