What is time?

• 1. Time in history. How do we measure time?• 2. Time characteristics in physics theories• 3. Definitions of time

CHAPTERS

1. Time in history. How do we measure time?

Maya Temple

Cesium transitions

2. Time characteristics in physics theories

• NEWTON

• EINSTEIN

time

Definitions of time given by dictionaries

• The measured or measurable period during which an action, process, or condition exists or continues(Merriam-Webster)

• The part of existence that is measured in minutes, days, years, etc., or this process considered as a whole(Cambridge)

• The quantity that you measure using a clock(MacMillan)

„I know what time is until you ask me for a definition about it, and then I can’t give it to you” (St.Augustine)