time travel: a science fiction or a science fact?

Time Travel:

A Science Fiction orA Science Fact?

Prepared by: Sayeem Khan (1106076)

Outline

Concept of Time Travel Time travel to Past Time travel to Future

Paradoxes The “Grandfather Paradox” Stephen Hawking’s Paradox

Some discussion on Ronalt Mallett’s Time Machine

Concept of Time Travel

Theory of RelativityTime is the “Forth Dimension”Time is relative

Time Travel to the Past

Possible Methods:•Travelling faster than light•Wormholes•Cosmic Strings or Black Holes

Time travel to the Future

Possible Methods:•Time-Dilation•Hibernation•Time-perception

The Grandfather ParadoxGoing back

in TimeChapman kills his

grandfather

Chapman’s parents are

not bornEven

Chapman is not born

So he didn’t kill

his grandfathe

r

??????

Replies to“Grandfather Paradox”

Novikov’s Self-Consistency principle• Contradictory causal loops cannot form, but

those consistent ones can.

Parallel Universes• Multiple version of future exist in parallel

universes.

Hawking’s Paradox

Why don't we observe tourists, souvenir hunters, historians, archaeologists, Criminals visiting us from future?

A Reply to this paradoxGlobal warming, Nuclear war, Super Viruses or The Robotic Uprising killed all human

Dr. Ronald Mallett

A Physicist trying to build world’s first “Time-Machine”

Concept of Mallett’s Time Machine

Thank You

For further information Contact: sayeemk@yahoo.com

Question???