TIME?HOW IT IS RELATED WITH SCIENCE?CAN WE TRAVEL THROUGH TIME?IF YES HOW?BYRakesh Bisht

TIME

Time is a part of the measuring system used to sequence events, to compare the durations of events and the intervals between them, and to quantify rates of change such as the motions of objects. The Standard S.I unit of time is Seconds.

Time is hard to define. For starters you cannot see or touch it, but its effects are clearly visible.

The evidence that we are moving through time is found in everything: our bodies age, buildings weather and crumble, trees grow, etc.

This is what we all know… But there is something more depth in time. The second is the duration of 9,192,631,770 periods of

the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom.

Atomic Clock

SPACE AND TIME

Space and time are involved in a special relationship. The effects of time on our physical surrounding are very

real. Apart from that, time is also defined as the fourth dimension of the universe with the other three being space dimensions.

So tight that you might wonder whether either of them could exist without the other.

This interconnected relationship of space and time is called the space-time continuum, which means that any event that occurs in the universe has to involve both space and time.

A simple example of this relationship would be that of two objects that cannot exist in the same space at the same time, they have to be in their 'own' space, or they might occupy the same space, but at different times.

EINSTEIN REVIEWS

...for us physicists believe the separation between past, present, and future is only an illusion, although a convincing one...

-- Albert Einstein

EINSTEIN THEORY OF RELATIVITY

The Einstein Theory of Relativity relates to our physical universe. It notes that time is relative with the speed of the object while moving through space.

According to this theory time passes differently for celestial bodies that move at different velocities.

 This concept is hard to grasp, and even harder to apply to our reality.

The main reason for this is that we ourselves are physical beings that inhabit a planet that moves with a fixed speed.

Time on earth is therefore linear. To measure the speed of time you need at least two

objects that travel at different speeds. When they reunite time has past differently for each

object.  The closer the speed of an object gets to the speed of

light, the slower the time in that object passes compared to another object that remains 'stationary'. 

EINSTEIN THEORY OF RELATIVITY

The concept here is that time is not linear, but relative.  It indicates that our day-to-day perception of time, is

different than its real nature. However, the circumstances needed to observe, proof

and 'benefit' of this real nature are 'extreme' and have not yet been accomplished.

The one circumstance that we know that affects the behavior of time is the speed of the physical object in the universe.

However since it is proven that time is relative, it might also be possible that its relativity depends on more variables than just 'movement of the object'.

Also, since movement has direction (there are three space dimensions) is seems conceivable that time itself has direction too, or could even curve, bent, fold, twist etc.

This where the question arises??

EINSTEIN THEORY OF RELATIVITY

If this is true then time travel is possible…. Now next question is how? This question is chasing the thoughts of scientist’s from

decades…..

LETS SEE WHAT FURTHER THIS THEORY SAYS?

Einstein's theories about time and relativity are based on the existence of a physical universe.

To be able to measure time you need to have physical objects (matter, mass) that move through space.

These objects generally suffer the effects of time (aging).

Further to that there seems to be a need for consciousness in order to have a notion of time.

Therefore, to measure the passing of time it seems that you need matter, movement and consciousness.

What would happen to time itself if one of these basic entities is taken away? Is time maybe a result of interaction of these entities?

Again a question mark????????

LETS SEE WHAT FURTHER THIS THEORY SAYS?

As a comparison we could look at other entities that are the result of movement:• An induction electric current for instance is the result of the

movement and interaction of objects with certain characteristics. 

• Without objects or movement, induction electricity does not exist.

•  It gets only generated under special circumstances and disappears when the conditions needed cease to exist.

• It is not an absolute static entity that always exists but a derived one.

The question is: If you cannot measure time because one of the key entities

is missing, whether time itself continues to exist, time might be generated and only exists as a consequence of interaction between matter, movement and consciousness.

LETS SEE WHAT FURTHER THIS THEORY SAYS?

Universal rules determine how time applies to physical objects that move through space.

However, there are no definite rules about how it would apply to pure non-physical entities.

 Imagine a free, unattached, independed consciousness, that can move through space and interact with the physical universe, but without having mass or body (God, angels, spirits).

A discussion regarding such entities might be useless as we cannot proof that they exist.

If they would exist however It would be hard to determine and imagine how time would affect such entities.

GODS ANGELS

SPIRITS

TIME TRAVEL

Time travel is the concept of moving between different points in time in a manner analogous to moving between different points in space.

Time travel could hypothetically involve moving backward in time to a moment earlier than the starting point, or forward to the future of that point without the need for the traveler to experience the intervening period (at least not at the normal rate).

 Any technological device whether fictional or hypothetical

that would be used to achieve time travel is commonly known as a Time machine.

Although time travel has been a common plot device in science fiction since the late 19th century, and the theories of SPECIAL and GENERAL relativity suggest methods for forms of one-way travel into the future via time dilation.

 It is currently unknown whether the laws of physics would allow time travel into the past.

TIME TRAVEL

This lead to proposal of many theories and hypotheses….

In modern Scientists STEPHEN HAWKING contributed major part….

“BECAUSE THERE IS A LAW SUCH AS GRAVITY, THE UNIVERSE CAN AND WILL CREATE ITSELF FROM NOTHING”

-STEPHEN HAWKING

STEPHEN HAWKING CONTRIBUTION

The laws of physics actually accommodate the notion of time travel, through portals known as wormholes.

"The truth is wormholes are all around us, only they're too small to see. They occur in nooks and crannies in space and time," Hawking writes. "Nothing is flat or solid. If you look closely enough at anything you'll find holes and wrinkles in it. It's a basic physical principle, and it even applies to time. Even something as smooth as a pool ball has tiny crevices, wrinkles and voids.”

Down at the smallest of scales, smaller even than molecules, smaller than atoms, we get to a place called the quantum foam.

This is where wormholes exist. Tiny tunnels or shortcuts through space and time

constantly form, disappear, and reform within this quantum world.

And they actually link two separate places and two different times.

WORM HOLES

The tunnels, unfortunately, are far too small for people to pass through -- just a billion-trillion-trillionths of a centimeter -- but physicists believe it may be possible to catch a wormhole and make it big enough for people, or spaceships, to enter, Hawking writes.

Theoretically, a time tunnel or wormhole could do even more than take us to other planets.

If both ends were in the same place, and separated by time instead of distance, a ship could fly in and come out still near Earth, but in the distant past.

 Maybe dinosaurs would witness the ship coming in for a landing.

A wormhole is a theoretical 'tunnel' or shortcut, predicted by Einstein's theory of relativity, that links two places in space-time - visualised above as the contours of a 3-D map, where negative energy pulls space and time into the mouth of a tunnel, emerging in another universe. They remain only hypothetical, as obviously nobody has ever seen one, but have been used in films as conduits for time travel - in Stargate (1994), for example, involving gated tunnels between universes, and in Time Bandits (1981), where their locations are shown on a celestial map.

CONCLUSION

Ultimately, scientists may find that only travel into the future is possible, as the laws of nature may make travel to the past impossible so the relationship between cause and effect is maintained. For example, if you could travel in the past and do something that prevents yourself from being born, how could you exist in the future to travel back in time?

So, for every discovery there are both advantages and disadvantages. But the ultimate goal must be , it should not be against the nature……

THE END:

Thank you