What Is Time?

This section provides a quick introduction of time, which is a property of our universe that gives us a sense of age of living things and speed of changing object.

What Is Time? Time is a property of our universe that gives us a sense of age of living things and speed of changing object.

Time helps us to define the age of animal by measuring how much time has lived since it's birth. An "older" age animal has lived more time. And a "younger" age animal has lived less time.

For example, if we compare a baby goose with an adult goose, we can see that the baby goose has lived less time and the adult goose. So we say that the baby goose is "younger" than the adult goose.

Time - Younger and Older Ages (Marcus Smith)
Younger and Older Ages

Space also helps us to define the speed of a changing object by comparing the amount of change against the amount of time past. A "faster" change means that there is less time past for a given amount of change. A "slower" change means that there is more time past for the same given amount of change.

For example, if we look a hound chasing a rabbit, we can see that the speed of the rabbit is "slower" than the hound. The rabbit needs more time to run than the hound for the same distance.

Time - Slower and Faster Speeds (Umair Ghani)
Slower and Faster Speeds

Last update: 2014.

Table of Contents

 About This Book

 Introduction of Space

 Introducion of Frame of Reference

Introducion of Time

What Is Time?

 What Is Duration?

 Second Prefixes and Other Units

 List of Various Durations

 Introduction of Speed

 Newton's Laws of Motion

 Introduction of Special Relativity

 Time Dilation in Special Relativity

 Length Contraction in Special Relativity

 The Relativity of Simultaneity

 Introduction of Spacetime

 Minkowski Spacetime and Diagrams

 References

 PDF Printing Version