The physics of time

Course Dates: 17/07/21 - 18/07/21
Time: 10:30 - 13:00
Location: Online
We will explore the various different conceptions of time within modern physics. The absolute time of Newtonian mechanics is contrasted with the relativistic time of Einsteinian gravity. The possibility that time is quantized, made up of discrete moments, is seen to emerge in some of the most cutting edge theories of physics, such as loop quantum gravity and string theory. The emergence of time in the big bang, the direction of time, and the possibility of time travel are all explored.
This course will be delivered online. See the ‘What is the course about?’ section in course details for more information.
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Full fee £59.00 Senior fee £47.00 Concession £30.00

Course Code: HS181

Sat-Sun, day, 17 Jul - 18 Jul '21

Duration: 2 sessions

Or call to enrol:020 7831 7831

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What is the course about?

In this course, we explore the various different conceptions of time within modern physics. We examine the concept of absolute time proposed by Newton, and see how this contrasts with the relativistic picture required by Einstein’s theories. We consider how time might be quantised, rather than continuous, as implied by some versions of loop quantum gravity and string theory. We see how the arrow of time appears to emerge from thermodynamics, whilst considering to what extent this arrow might in fact be illusory. We consider the origins of time in the big bang. Finally we overview the possibility of time travel, and what limitations exist on such a possibility.

This is a live online course. You will need:
- Internet connection. The classes work best with Chrome.
- A computer with microphone and camera is best (e.g. a PC/laptop/iMac/MacBook), or a tablet/iPad/smart phone/iPhone if you don't have a computer.
- Earphones/headphones/speakers.
We will contact you with joining instructions before your course starts.

What will we cover?

- Absolute versus relativistic time
- Quantum time
- The arrow of time
- Time and the big bang
- Time travel.

What will I achieve?
By the end of this course you should be able to...

- state and explain the distinctions between absolute and relativistic time
- describe the ways in which time might be quantised
- describe the emergence of the arrow of time from thermodynamics
- explain the origins of time in the birth of the universe
- describe the ways in which time travel might be possible
- state the theoretical and physical limitations on the possibility of time travel.

What level is the course and do I need any particular skills?

No previous knowledge of physics is required. However an enthusiasm for learning and an open and critical mind will
enhance your enjoyment and benefit from this course.

How will I be taught, and will there be any work outside the class?

Interactive lecture - all information will be supplied via Powerpoint slides which will be made available for download.
Students should be prepared to contribute to class discussion and group work.

Are there any other costs? Is there anything I need to bring?

No other costs. Students who wish to take notes will need pen and paper.

When I've finished, what course can I do next?

HS173 :Understanding Einstein's theory of relativity - and why it matters
HS212: Astrophysics day.

Gary Retallick

Dr. Gary Retallick got his Phd in Physics at Kings college in London in 2006. His dissertation explored the physics of time, touching upon relativity, field equations, quantum mechanics, thermodynamics and metaphysics. Followng a stint within the world of teaching philosophy, Gary now teaches physics and mathematics at both Birkbeck College and the Open University alongside running several physics, chemistry and maths courses at City Lit (incl. Cornish).

Please note: We reserve the right to change our tutors from those advertised. This happens rarely, but if it does, we are unable to refund fees due to this. Our tutors may have different teaching styles; however we guarantee a consistent quality of teaching in all our courses.