time chaptr 1 changed.doc

Upload: iamaugustine

Post on 03-Apr-2018

215 views

Category:

Documents


0 download

TRANSCRIPT

  • 7/28/2019 TIME CHAPTR 1 changed.doc

    1/16

    CHAPTER 1

    SPACETIME INCEPTION: A HISTORICAL ANALYSIS

    Our everyday perception of the universe comes from looking up at the

    sky to see the Sun in the daytime and, more profoundly, to see

    thousands of stars in the night sky.some of the oldest questions since

    the beginnings of human thought are: How large is the universe? Did it

    ever begin? What are the principal constituents of the present universe?

    Will (space) time ever end? (Frampton 1).

    From the time when man started to radically question the world around him and its

    numerous mysteries, he observed that nature was in a constant state of flux. The

    space which he inhabited was continuously forming, demolishing, and re-forming

    itself through a certain period of time. This prompted him to ponder over the very

    center of these magical transformations in nature. This culminated in the discovery

    of the phenomenon called change which was constantly happening around in nature.

    With the idea of change came the concept of spacetime. Change has always been a

    consistent phenomenon. It is an obvious fact that spacetime and its presence can only

    be perceived through observing this change that is happening all around the world,

    up in the cosmos, and in the universe beyond. But it is highly essential that change

    and spacetime both are to be observed, analyzed, and judged. Only through the

    careful scrutiny using the senses and reason, we can determine the presence of

    change and the passing of something, that something called spacetime.

  • 7/28/2019 TIME CHAPTR 1 changed.doc

    2/16

    Spacetime, as we know it today, was not so dominant before. Philosophers and

    Scientists may debate on the question of when spacetime began. But that is a

    completely different and complex question with a number of answers, each

    contradicting or supporting the other. Spacetime needs to be perceived and observed

    and the whole question of its origin can be set aside for the more important one of how

    it was considered by human beings, how it became a dominant phenomenon, how it

    governed human thinking and consciousness, and how it became a powerful entity that

    controlled our very existence, our life, our death, and our history.

    Scientists agree that civilization actually began with the end of the ice age,

    some 12,000 years ago. Progress from a prehistoric state was made possible because

    man was inquisitive; philosophy was always in the blood of man. He perceived the

    changes happening in nature, the change from light to darkness, the movement of the

    heavenly bodies, and the endless yet periodic cycles of life and death. Living in a

    social setup generated a sense of order and this need for order further gave strengthto studying the changes happening around and especially the influence of spacetime.

    Aristotle was highly concerned with the changes that happened in nature. This

    change seemed to prompt us to believe in the presence of spacetime. Aristotle said:

    Whether, if soul did not exist, time would exist or not, is a question that may fairly be

    asked; for if there cannot be someone to count there cannot be anything that can be

    counted(Aristotle 29). Thus he proposes that when we are ready to observe,

    perceive and record change, we can easily understand the passing of spacetime. But

    when we disregard change and quit observing the passage of spacetime, it ceases to

  • 7/28/2019 TIME CHAPTR 1 changed.doc

    3/16

    exist. Human reason and intellect thus plays a vital role in our understanding of

    spacetime. Aristotle claimed that time is the measure of change but also that time is

    not change because a change may be faster or slower, but not time (Aristotle

    32). He advocates the notion that there is no time apart from change (41).

    Aristotle considered spacetime as a natural entity similar to matter itself, something

    which is hard to divide and something which is continuous. He said, In respect of

    size there is no minimum; for every line is divided ad infinitum . Hence it is so with

    time (Aristotle 36).

    Aristotle also propagated the notion of absolute spacetime. He believed that

    events determine the passage of spacetime, the period between two events which when

    measured gives you the exact spacetime for these events to happen. Aristotle might

    have been considering the natural events that took place all around nature. The

    seasonal cycles and other such natural phenomenon could have been predicted thus

    with some accuracy (Gaarder 107). Thus with the ideas of Aristotle, who dominatedworld thinking and philosophy for a considerable amount of time, the notion of

    spacetime being absolute got a firm foundation. Aristotle also considered time to be

    a separate entity from space. Later on his ideas were widely challenged; it became

    clear that there was no such thing as absolute spacetime because it cannot be perceived

    directly. We evaluate and understand spacetime differently, spacetime is different for

    different people, even when two people are observing the same event their evaluation

    of spacetime would be different.

  • 7/28/2019 TIME CHAPTR 1 changed.doc

    4/16

    Christian Theologians who had their deep faith in divine power of God behind

    the creation of the universe, believed spacetime also as an entity created by god. St.

    Augustine was of the opinion that spacetime never existed before our universe was

    created. But he does not hesitate to share his confusion with the philosophers of his

    time regarding the definition of spacetime when he says: What then is time? If no one

    asks me, I know what it is. If I wish to explain it to him who asks me, I do not know

    (Augustine 18). St. Augustine had a very subjective view of spacetime. His ideas on

    spacetime can be related with those of Aristotle. He firmly believed that spacetime is

    nothing in reality but exists only in the minds apprehension of that reality.

    Spacetime gradually started to dominate over our consciousness and thus a

    need arose to generate methods to measure it, to contain it, to dominate it. Not all

    human beings who lived in societies at that time felt the need to record spacetime.

    Some were quite happy with observing the single most powerful entity that was seen

    producing change- the sun. It was the giver of life, the destroyer, and the perpetuator of life. Observing the sun and its shifting from one position in the sky to the next was

    more than enough to understand the passing of spacetime. But while living in a

    civilized setup one felt the need for proper spacetime-keeping. Clocks were made in

    the Middle East and Africa some 5000 to 6000 years ago. The need for order

    prompted men to make clocks. Agriculture, religious festivities, and other social

    activities required some kind of order; this order was provided by the keeping of

    spacetime.

  • 7/28/2019 TIME CHAPTR 1 changed.doc

    5/16

    Spacetime was always present, but even when man tried to measure it he could

    never explain what it was, or where it could be found. But spacetime can be measured

    with relation to some matter, or the motion of matter. The notion of spacetime

    continuously flowing started to strengthen then, this was assisted by the invention of

    the hourglass and the water clock. In an hourglass, the flow of sand, which was

    carefully measured, reminded us of the flow of spacetime. The water clocks were

    designed in such a way that the measured dripping of water governed our

    measurement of spacetime. Hence spacetime was equated with the flow of particles, of

    matter. The ideas of the philosopher Heraclites ring out clearly now. He had argued

    that the only thing that was basic in nature was change and flow of spacetime.

    Everything flows said Heraclites. Everything is in a state of flux and thus we

    cannot step twice into the same river (Gaarder 54).

    Still spacetime was mostly perceived through the cyclic, regular occurrence of

    certain phenomenon. The seasonal cycle was vital in this, together with theobservation of the cosmos- the sun, the moon, and the stars. The wonders of the sky

    (and the space beyond) were numerous. Cosmology thus played a vital part in forming

    the concept of spacetime. The stars and their different constellations were considered

    to signal some incident that might happen later in spacetime. The eclipse of the moon

    also helped in determining days, months, and years. Religion too started to take root,

    with its faith grounded in the human perception of change and the passing of

    spacetime, spacetime which was just one among the entities which served the all

    powerful perpetuator of this change- God.

  • 7/28/2019 TIME CHAPTR 1 changed.doc

    6/16

  • 7/28/2019 TIME CHAPTR 1 changed.doc

    7/16

  • 7/28/2019 TIME CHAPTR 1 changed.doc

    8/16

    Clocks thus began to be recognized as devices capable of measuring spacetime, linear

    spacetime. This was a period of a whole new scientific revolution of experimentation

    and analysis. Proof of every hypothesis was provided and hence science became more

    accurate and popularly acceptable. This influence of science dominated over the

    masses and their ideas on spacetime. Newtons laws were even used to study the

    motion of celestial bodies. His ground breaking laws on gravity and motion hence

    opened a new chapter in the study of spacetime.

    Newtons absolutism was refuted by Gottfried Leibniz. His studies were also

    based on change. Leibniz proposed his theories on spacetime which he considered to

    be relative; he said I hold space to be something merely relativeas an order of

    coexistences, as time is an order of successions (Jolley 39).Newton challenged the

    theories of Leibniz with his remarks on spacetime: Absolute space, in its own nature,

    without relation to anything external, always remains similar and immovable (Jolley

    39). Leibniz objected to Newtons views and proposed his relational theory of spacetime. His argument again was that spacetime was not an entity which had an

    independent existence. It too depended on the happening of events no matter how

    irregular they were. Leibniz considered the overall ordering of events as time.

    The German philosopher Immanuel Kant considered spacetime as a form of

    human intuition. He considered the relationship of spacetime with the human mind, a

    unique concept at that time. Spacetime, for him, was more how the mind of a person

    perceived it. Kant felt that human senses could only perceive the world through

    spacetime. In his Critique of Pure Reason he says that the representation of space

  • 7/28/2019 TIME CHAPTR 1 changed.doc

    9/16

  • 7/28/2019 TIME CHAPTR 1 changed.doc

    10/16

    ships were lost at sea or were destroyed because of the inability to calculate precise

    spacetime. With the invention of the chronometer by Harrison, navigation became

    easier. Thus the quest for spacetime, in a way, assisted sea explorations. Such

    explorations would later assist in colonization and imperialism is another aspect of this

    altogether.

    By the early 1800s mechanical parts identical to each other were produced

    which facilitated the mass production of clocks. Clocks became cheaper and popular.

    Families could now afford for them, spacetime started to become more personal, in a

    sense a consumer item. From here begins the steps which would lead to todays lack

    of regard for spacetime. The concept of linear spacetime, as promoted by Barrow,

    Newton, Kant and other philosophers and scientists was still strong during this period.

    This strengthened the place of the concept of linear spacetime in the mentality of

    nineteenth century European science and philosophy.

    Up until the beginning of the 20th

    century, people continued to believe inabsolute spacetime. With Albert Einstein science found new ways to challenge the

    notions of absolute spacetime. Albert Einstein was a German physicist whose path

    breaking findings on the general and special relativity paved way to a fresh

    understanding of spacetime in science. He demonstrated spacetime as not being an

    absolute entity which flowed at a fixed rate (Parsons 113). He proved that spacetime,

    is relative to the degree of motion of the observer (depending on the position of the

    observer, distances either seem to compress or stretch, and clocks to run faster or more

    slowly) (Parsons 113). Spacetime measurements thus could never have absolute,

  • 7/28/2019 TIME CHAPTR 1 changed.doc

    11/16

    universal meaning. This groundbreaking theory in science put an end to absolute

    spacetime. Spacetime became more personal, each person who experienced an event

    in spacetime must perceive it differently. Stephen Hawking in his A Brief History of

    Time says The theory of relativity, however, forces us to change fundamentally our

    ideas of space and time. We must accept that time is not completely separate from and

    independent of space (Hawking 52) To quote Hawking again:

    the discovery that the speed of light appeared the same to every

    observer, no matter how he was moving, led to the theory of relativity

    and in that one had to abandon the idea that there was a unique absolute

    time. Instead, each observer would have his own measure of time as

    recorded by a clock that he carried: clocks carried by different

    observers would not necessarily agree. Thus time became a more

    personal concept, relative to the observer who measured it (Hawking

    60).Relative spacetime is considered with regard to some motion. This is similar

    to the measuring of spacetime using the rhythmical motion of a pendulum, a clock or

    the motion of the heavenly bodies. Relative spacetime is against the notion of absolute

    spacetime and hence it may not be accurate. It will vary from person to person. The

    theory of relativity is grounded in the study of light and its speed. The speed of light is

    now used to measure spacetime.

    Henri Bergson was of the opinion that spacetime as it is experienced by the

    consciousness is entirely different from the spacetime which we have come to take for

  • 7/28/2019 TIME CHAPTR 1 changed.doc

    12/16

    granted through the configurations of clocks and calendars. Subjective consciousness

    is vital to understand spacetime and to actually experience it. Bergson supported the

    claims for the union of space and time into one entity called spacetime. He was of

    the opinion that through our subjective perception of spacetime we can experience

    spacetime as it really is: a continuum in which past, and present interpenetrate or

    melt into each other (Parsons 111). Bergson calls this duration.

    Another development was in the concept of relationship between space and

    time, a unique concept of space time was formulated (at last!). In the very words of

    Hermann Minkowski who played a vital role in promoting this concept of the union of

    space and time: Henceforth space by itself, and time by itself, are doomed to fade

    away into mere shadows, and only a kind of union of the two will preserve an

    independent reality (Petkov 81). Minkowski was Einsteins former tutor and his ideas

    helped Einstein in formulating his theory of Relativity which demonstrated and further

    expanded on the claims that space and time are inseparable: time and spaceneeded to be understood as inseparable: as a combination of three-dimensional space

    plus a fourth dimension of time (Parsons 112). Scientific discoveries in the field of

    astronomy aided in the understanding of the universe and through it the concept of

    spacetime. Edwin Hubbles observations suggested the possibility of a Big Bang as

    the reason behind the origin of the universe and with it the birth of spacetime.

    In this period heated debates were also held on whether spacetime is real or

    just an imaginary construct. The philosopher John Ellis Mc Taggart was foremost in

    this debate. He joined the long line of early philosophers including Zeno, Plato,

  • 7/28/2019 TIME CHAPTR 1 changed.doc

    13/16

    Spinoza, and Hegel by claiming that spacetime did not exist. Philosophers including

    Mc Taggart claimed that the passage of spacetime was mere illusion and the only real

    entity was the present. He argues that the relationship between the past, present, and

    the future is continuously changing, but spacetime is based upon this relationship

    between past, present, and the future. A concept which keeps on changing and has no

    firm base to stand upon is a false concept; hence spacetime is merely an illusion. In the

    words of Mc Taggart from his The Unreality of Time,

    Position in time, as time appears to usare distinguished in two ways.

    Each position is earlier than some, and later than some, of the other

    positions. And each position is either past, present, or future. The

    distinctions of the former class are permanent, while those of the latter

    are not. But an event, which is now present, was future and will be

    past (Sherover 282).

    Mc Taggart further asserts his claims by saying, it because the distinctions of past, present and future seem to be essential for time, time is unreal. Mc Taggart

    implements his theories on spacetime to study the concept of history. He observes

    that historical events have same spacetime characteristics as made up stories.

    Stories and histories are based upon the past, present, and the future; concepts which

    he proved as ever changing, hence histories, which rely on the memory of the past,

    which varies from person to person is no better than made up stories (Sherover 278-

    285).

  • 7/28/2019 TIME CHAPTR 1 changed.doc

    14/16

    The advancement in science has facilitated the better understanding of our

    universe. The quest for understanding our origins thus becomes a quest to crack the

    confusion surrounding spacetime. Stephen Hawking and his revelations regarding the

    Big Bang have proved to be vital. He considers the logical possibility that spacetime

    might have had its beginning with the Big Bang since an earlier time simply would

    not be defined (Hawking 64). According to him, the laws of science do not

    distinguish between the past and the future. Events are described as things that happen

    at a particular point in spacetime. While spacetime is unique for all events, it too is

    affected by the events that happen in the universe. Thus Hawking makes it clear that

    our views of the nature of time have changed over the years.

    Hawking uses the second law of thermodynamics, which says that in a closed

    system disorder, or entropy, always increases with spacetime, to put forward his

    unique concept of the Arrow of Time. He says that, The increase of disorder or

    entropy with time is one example of what is called an arrow of time, something thatdistinguishes the past from the future, giving a direction to time (Hawking 187). His

    views on the Psychological Arrow of Time is very insightful, according to him the

    psychological arrow of time, is the direction in which we feel time passes, the

    direction in which we remember the past but not the future (Hawking 188).

    Recent debates have been held on discussing whether the universe really had a

    beginning and with it did spacetime too began, and also whether with the end of this

    universe spacetime too would end. Scientists have put forward the concept of the Big

    Rip a phenomenon to happen some trillion years in the future. But these scientific

  • 7/28/2019 TIME CHAPTR 1 changed.doc

    15/16

  • 7/28/2019 TIME CHAPTR 1 changed.doc

    16/16

    getting due representation and reflection in fiction was high. While the fictional

    universe tried to portray the world around as truthfully as possible (initially),

    spacetime was utilized as a mode to order events and perceptions in a narrative. A

    symbiosis was the vision behind such a cooperation, but unfortunately it did not take

    effect due to numerous reasons.