All About TimeTime- a profound issue in modern physics

Why is Time a Mystery?Our life is embedded in the concept of Time

How would you explain it?

Our goal is to understand it from the perspective of physics…and then…

Connect it to other aspects of science and to our everyday lives

The pace of life quickens…

…but a full understanding of Time still eludes us

The pace of life some believe time exists outside man, exist objectively, and has measurable and linear characteristics. “ For some in primitive societies time is apprehended differently. For them it is a much looser concept, more open, elastic, subjectively.

it is said the pace of life is fastest in Switzerland and Germany

Time works the way it does in our everyday lives because of the way the universe works

An understanding of time cannot be found in everyday experience but in the creation of the universe itself

The importance of TimeIn every endeavor of mankind…

In physics, biology, medicine, neuroscience, psychology, and all the human sciences (history, politics, economics

If we can achieve an understanding from physics, then maybe we can better understand times connections elsewhere and in everyday living

time intervals• we are fundamentally aware of time intervals of

only a few seconds• our Flicker Fusion Frequency: the shortest

perceivable interval between events-for humans between 50 and 60 flashes per second-hearing seems to be more sensitive to time intervals

• time seems to speed up as you age, because experiences are repeated and memories condensed, seeming to take up less time

• psycho active drugs have a similar effect

the reverse can often be true: a stretch full of action and excitement seems to have taken a long time, while a tedious. A board of his condensed to a brief moment.

A month of sickness may hardly yield more memories than a day

a week of travel and sightseeing may seem more like three weeks in the memory

Physicists, artists and graph makers of all

kinds routinely depict time as another

dimension of space, creating a unified spacetime—shown

here as a three-dimensional block in which a ball bounces off a wall. Relativity theory holds that spacetime can be

sliced up in various ways. But not all are

equally sensible.

IS TIME AN ILLUSION?

Sideways ClockDaniel Arsham, 2012

The flow of time.. is it an illusion?

Does consciousness give us the impression of living moment-to-moment?

There are differing views on this, but we will focus on the view that the “arrow of time” is real and time itself is different from the other dimensions of the “space-time continuum”

Views on TimeThe “eternal list” or “block universe” view …time is an illusion: the entire history of the universe simply is

Time is real, and that the passage of time plays a generative role: it brings the future into existence.

Additionally Lee Smolin in “Time Reborn” has suggested that the laws of physics themselves are evolving with time.

Sean Carroll: Time is real-actually existing, not merely illusory-and yet it may turn out not be a fundamental measure of the universe

The Beginning of Time the cosmologist answers are different than that given by the creation myths of the civilizations around the world

in the Judeo-Christian tradition time began with God's creation of the universe, and always moves forward in one direction: but many other cultures, both past and present, believe in cyclical time

Estimates of the age of the earth age, thousands of years date

USSHER 6 1650de Maillet 2,400,000 1738

Buffon 75 1774Lyell 35 1831

Phillips 100,000 1860Kelvin 20-40,000 1897

Current estimates

4,540,000 2000

Lightspeed

300,000 km/s, or 186,000 mi./s

in one nano second, light travels about a foot, 30 cm or so

one nano second is one billionth of a second (10-9 or 0.000000001 seconds)

A Summary Time: everyone knows what it is, no one knows what it is

quantum mechanics suggests there is no difference between the past the present and the future

relativity suggests there is no difference between the past the present and the future

the details about the beginning of the universe-the Big Bang- are not understood. Was this the beginning of time or not?

The sun is about 5 billion years old. In another 5 billion years, it will swell into a red giant, after which it will form a spectacular planetary nebula like the Eskimo nebula, and for the Earth time will end.

a galactic year is the time it takes the sun to orbit the Milky Way galaxy-about 230 million Earth years

if the age of the earth were compared with a 24 hour clock, the first humans would appear only 40 seconds a four midnight. F

Mathematics and the Universe

• Once you believe the creation is the work of a rational God, mathematics becomes the key to unlocking its secrets and to establishing a union with the creator. It is in the Pythagorean legacy that we find the idea that nature’s essence is mathematically symmetrical and thus perfect, a notion that is at the root of the unification dream. To decipher nature secret was to unveil the symmetries hidden in the deeper layers of reality, below the chaotic diversity of the world.

From “A Tear at the Edge of Creation” by Marcelo Gleiser.