Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 35 - Think and Discuss: 93

Answer

The strongest evidence is given by particle accelerators.

Work Step by Step

In accelerators it has repeatedly been shown that no matter how long a force is applied on a particle, giving it more and more kinetic energy, it never reaches, much less exceeds, the speed of light. Such experiments are ongoing, literally every minute.
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