Special Relativity: Crash Course Physics #42
This episode of Crash Course Physics is supported by Prudential. Go to www.raceforretirement.com to learn how, if you start saving today, you can continue to enjoy the things you love tomorrow....
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This episode is supported by Prudential. Let’s say you’re waiting for a friend of yours to arrive on a train. And, I should point out, it’s a very-much-hypothetical train. For one thing, it’s moving toward you in a vacuum. And somehow, it can travel at half the speed of light. But your friend, Bob, is on this amazing hypothetical train! Oh, and the front of the train has a headlight. From Bob’s perspective standing on the train, the light from the headlight is moving away from him at the speed of light. So the train is moving at half the speed of light, but at the same time, it’s shooting out light from its headlight that’s moving at the speed of light. You’d think that from your perspective on the platform, it would look like the light c...
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This episode is supported by Prudential. Let’s say you’re waiting for a friend of yours to arrive on a train. And, I should point out, it’s a very-much-hypothetical train. For one thing, it’s moving toward you in a vacuum. And somehow, it can travel at half the speed of light. But your friend, Bob, is on this amazing hypothetical train! Oh, and the front of the train has a headlight. From Bob’s perspective standing on the train, the light from the headlight is moving away from him at the speed of light. So the train is moving at half the speed of light, but at the same time, it’s shooting out light from its headlight that’s moving at the speed of light. You’d think that from your perspective on the platform, it would look like the light c...
