Quote by Carl Sagan, Cosmos. (New York: B

Imagine that I am riding a bicycle toward you. As I approach an intersection I nearly collide, so it seems to me, with a horsedrawn cart. I swerve and barely avoid being run over. Now think of the event again, and imagine that the cart and the bicycle are both traveling close to the speed of light. If you are standing down the road, the cart is traveling at right angles to your light of sight. You see me, by reflected sunlight, traveling toward you. Would not my speed be added to the speed of light so that my image would get to you considerably before the image of the cart? Should you not see me swerve before you see the cart arrive? Can the cart and I approach the intersection simultaneously from my point of view, but not from yours? Could I experience a near collision with the cart while you perhaps see me swerve around nothing and pedal cheerfully on toward the town of Vinci? These are curious and subtle questions. They challenge the obvious. There is a reason that no one thought of them before Einstein. From such elementary questions, Einstein produced a fundamental rethinking of the world, a revolution in physics.


Imagine that I am riding a bicycle toward you. As I approach

Summary

This quote highlights the fascinating concept of how perception and the speed of light can alter our understanding of events. It presents a thought experiment where a bicycle and a horse-drawn cart are involved in a near collision. However, when both of them are traveling close to the speed of light, their relative speeds and the angle of observation come into play. The quote questions whether the speed of light would affect our visibility of these events, suggesting that different observers may perceive the situation differently. This thought experiment illustrates how Albert Einstein's groundbreaking theories challenged conventional wisdom and led to a revolutionary reimagining of the world through his contributions to physics.

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By Carl Sagan, Cosmos. (New York: B
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In view of all this, I have no doubt that Cambyses was completely out of his mind; it is the only possible explanation of his assault upon, and mockery of, everything which ancient law and custom have made sacred in Egypt. If anyone, no matter who, were given the opportunity of choosing from amongst all the nations in the world the set of beliefs which he thought best, he would inevitably, after careful consideration of their relative merits, choose that of his own country. Everyone without exception believes his own native customs, and the religion he was brought up in, to be the best; and that being so, it is unlikely that anyone but a madman would mock at such things. There is abundant evidence that this is the universal feeling about the ancient customs of one's country. One might recall, in particular, an anecdote of Darius. When he was king of Persia, he summoned the Greeks who happened to be present in his court, and asked them what they would take to eat the dead bodies of their fathers. They replied that they would not do it for any money in the world. Later, in the presence of the Greeks, and through an interpreter, so that they could understand what was said, he asked some Indians, of the tribe called the Callatiae, who do in fact eat their parents' dead bodies, what they would take to burn them. They uttered a cry of horror and forbade him to mention such a dreadful thing. One can see by this what custom can do, and Pindar, in my opinion, was right when he called it king of all.(Herodotus is expressing his own feelings about the story of the madness of Cambyses)

Herodotus, Custom Rules (from Th