# Wormhole

What is wormhole?

A bridge between black hole and white hole A shortcut through spacetime The fourth dimension No evidences to prove its existence

What is 4th dimension?

Length Depth Height Time

What is wormhole?

Two different wormhole 1. Schwarzschild wormholes

○ also called ‘Einstein-Rosen Bridge’ ○ Inter-universe wormhole connecting two universes

2. Traversable wormholes

○ not traversable due to unstable property

○ Intra-universe wormhole connecting two locations in

a universe ○ May involve the possibility of ‘Time Travelling’ ○ Only be possible if exotic matter with ‘negative energy density’ could be used to stabilize them

How it was found?

First spoken by Ludwig Flamm He studied Einstein notation(introduced in 1916) and found out that there are 2 solutions in Einstein’s equation.(i.e. Black hole and white hole)

Function of Wormhole

Wormhole may not really exist Functions are guessed by scientists

Function of Wormhole

Shortcut in the space for travelling

Function of Wormhole

Some criteria must be fulfilled

2.The connection must be stable

1.There are two sides wormhole connection 3.The travel time must be short, at least shorter

than the human life

Function of Wormhole

Long Distance Travel

http://www.youtube.com/watch?v=SafwXdP7ylc

Method to stabilize wormhole

Negative Mass

Neutralize the strong gravitation of

wormhole Enlarge the size of wormhole so that a spaceship can pass through

Time Travelling

Another function of wormhole is transfer to another universe may be the future, or the past, or another world

How do scientists think about time travelling?

Albert Einstein and Stephen Hawking did not agree

future.

Nothing can run faster than light.

We cannot see travelers from the

What will happen if time travelling exists?

Spacetime will be changed Contradiction exists

Conclusion...

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