Time travel

• ABILITY TO TRAVEL TO ANY POINT IN SPACE

• FUTURE TRANSFORMED INTO PAST WITH PRESENT LASTING FOR FLEETING MOMENT

• TIME- FOURTH DIMENSION OF UNIVERSE

• ALBERT EINSTEIN’S THEORY OF RELATIVITY LAID THE FOUNDATION FOR THEORETICAL POSSIBILITY OF TIME TRAVEL

THEORY

• Einstein’s 1st major contribution to study of time-”special theory of relativity”

• Time is relative to speed• RELATIVITY STATE-if

one were to move away from the earth at relativistic velocities and return ,more time would have passed on earth than for the traveler.

TIME TRAVEL TO THE PAST

• TIME TRAVEL TO THE PAST IS THEORETICALLY ALLOWED USING THE FOLLOWING METHODS

• 1) TRAVELLING FASTER THAN THE SPEED OF LIGHT

• 2)USE OF COSMIC STRINGS AND BLACK HOLES

• 3)WORMHOLES

TRAVELLING FASTER THAN SPEED OF LIGHT

• Relativity states-velocity of an object reaches speed of light, time slows down

• Scientist have discovered that even at the speed of space shuttle, astronauts can travel a few nanoseconds into the future.

BLACK HOLES

• When stars reach the end of their life, they collapse under the pressure of their own weight. This implosion creates BLACK HOLES.

• Gravitational fields is very strong

MASSIVE SPINNING CYLINDERS

• Developed by Frank Tipler

• If cylinder spins fast enough about its long axis, then a spaceship flying around the cylinder on a spiral path could travel back in time.

WORMHOLES

• Are wormholes tunnels for time travel????

• Wormholes are theoritical shortcuts through space and time.

• Tunnel like connection through space time

WORMHOLES

• It has two mouth connected by a throat

• Provide path that traveler could follow

• Theoretical • No experimental

evidence

EXPERIMENTS CARRIED OUT

• Delayed choice quantum eraser by

-MARLAN SCULLY

• Experiment by LIJUN WANG