CONTENTS

1 FAMILIAR EXAMPLES OF RELATIVITY

Does every Statement have a Meaning？

Right and Left

Is it Day or Night just now？

Who is bigger？

The Relative seems Absolute

The Absolute proves to be Relative

“Common Sense”tries to protest

2 SPACE IS RELATIVE

The same Place or not？

How does a Body move in Reality？

Are all Points of View equivalent？

Rest is found！

The Laboratory at Rest

Is the Train moving？

Rest is lost for good

The Law of Inertia

Speeds too are relative！

3 THE TRAGEDY OF LIGHT

Light does not spread instantaneously

Can the Speed of Light be altered？

Light and Sound

The Principle of Relativity of Motion seems to be shaken

“World Ether”

A difficult Situation arises

Experiment must decide

The Principle of Relativity triumphs

Out of the Frying Pan into the Fire

4　TIME PROVES TO BE RELATIVE

Is there in Fact a Contradiction？

We go on a Train Journey

“Common Sense”in Disgrace

Time suffers the same Fate as Space

Science Triumphs

Speed has a Limit

Earlier and Later

We get on the Train again

5 CLOCKS AND RULERS PLAY TRICKS

Clocks go slow systematically

The Time Machine

Journey to a Star

Objects get shortened

Velocities play Tricks

6　WORK CHANGES MASS

Mass

Mass increases

How much does a Gram of Light cost？

SUMMING UP

APPENDIX：The Year of Dr．Einstein

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