Time

Time at its most basic level is a measuring system used to record and compare duration of events.

Time in History•In the old testament, time is looked at as a passage of predestined events.

•In Christianity, time is looked at as an illusion, which begins with the creation of the world and ends with the Second Coming.

•Wheel of time, which looks at cyclical time is used in many religions including hinduism and buddhism amony many other Native American tribes.

•In Greek mythology, time has been personified in the names of Chronos, who turns the wheel of time and Kairos, who signifies a moment of great importance.

•In Hindu mythology also time is personified as Kala and Kali, who both are god and goddess of death and are associated with black.

Time in History•Hindu mythology also recognizes four cyclic yugas, where the creation and destruction of worlds take place in cyclic orders every 40 billion years.

•Each yuga also shows movement of human consciousness from enlightenment to darkness, where in the Kali Yuga, god Kalki comes and destroy everything wrong, again ushering the world into age of light.

•The Egyptians believed in the force of Mayet, which is the eternal and cyclical order of days, seasons, years etc.

•The Mayans were the first ones to understand a linear and cyclical nature of time. They devoted a lot of sacrifices and rituals so the sun god can cross the sky and to keep time flowing. They also prophesized the end of and age in the year 2012.

Evolution of Time in Science

• Galileo – the flow of time

• Newton – linear and universal time

• Benjamin Thompsom – thermodynamics and entropy

• Einstein – spacetime and relativty.

Time Dilation

• Relativity of Time• Time Travel – only in

future• Gravitational Time Dilation• Velocity Time Dilation

Arrow of Time

• Entropy • Linear direction.• The thermodynamic arrow.• The cosmological arrow.• The casual arrow.• Psychological arrow of time.• The water and dye experiment – the

ability of microscopic events to occur that go against the law of thermodynamics.

Chaos Theory

• Works only in Dynamic systems.

• Can be determined and calculated.

• Evolution and amplification of actions.

• Possibility to control the future? (as seen in the The

Foundation series by Isaac Asimov.)

Clock of the Long Now

• 10,000 year clock. • Maintenance with tools of bronze age.• Self-contained.

Doomsday Clock• Represents the time left in

catastrophic destruction.• Symbolic clock that shows the time as

one might see in terms of the state of the world.

• Moves back and forth.