Chapter 2.3 Faster speeds, longer hours – Space, Time and Einstein

Space, Time and Einstein J. B. Kennedy PART I – Einstein’s revolution Faster speeds, longer hours Someone might mistakenly think that the constancy of the speed of light leads to contradictions, and therefore cannot be true. For example, suppose there are two rockets travelling through space in the same direction but at different speeds, and … Read more

Chapter 2.1 Einstein in a nutshell Two theories of relativity

Space, Time and Einstein J. B. Kennedy PART I – Einstein’s revolution CHAPTER 2.1 Einstein in a nutshell – Two theories of relativity There are two Einsteins. For most of the world, Einstein (1879–1955) is a cult figure: the pre-eminent icon of genius. With his wispy, wild grey hair, missing socks and other-worldly idealism, he … Read more

From Aristotle to Hiroshima

Space, Time and Einstein J. B. Kennedy PART I – Einstein’s revolution CHAPTER 1: From Aristotle to Hiroshima Cup your hands together and peer down between your palms. What is between them? One answer is “air”. But we think of air as composed of separate molecules, like isolated islands. What lies between the molecules? Nothing? … Read more