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[文化博览] 【整理】2012-03-19 阿尔伯特·爱因斯坦 Einstein—3

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[Homework]2012-03-19 阿尔伯特·爱因斯坦 Einstein—3

Homework:
People didn't believe in atoms in those days. But he proves that atoms can actually make small dust particles move in a liquid. And he calculates thesize of atoms.
These papers would have been a remarkable career for anyphysicists. But Einstein is far from finished. He writes yet another paper witha famous equation: E=mc2. At the simplest level, this means energycan become matter and matter can become energy. The tiniest spec of matterholds potentially huge amounts of energy, unleashing required nuclear reaction, thesort going on constantly in the sky.
Ever since people begin to look up in the heavens, they would saywhat makes the star shine. But it took Albert Einstein to answer the question.Math(M) turns into E(Energy). That is the engine that lights up the stars.
Today E=mc2 is Einstein's most famous equation. But anothertheory he publishes the same year is more important and more controversial,the special theory of relativity. When Einstein was a teenager, he enjoyedimagining what would be like to ride being flight. Now, he returns to thisdaydream and changes his life.  
In the spring of 1905, Einstein was riding on a bus. And he looksback at the famous clock tower that dominates Bern, Switzerland. Then heimagines what happens if that bus were racing near the speed of light. In hisimagination, Einstein looks back the clock tower, and what he sees isastonishing. As he reaches the speed of light, the hands of the tower appear frozenin time. Einstein would later write, A storm broke in my mind. All of asudden, everything, everything kept gushing forward.  Einstein knowsthat back the clock tower, time is passing normally. But on Einstein's lightspeed bus, as he reaches the speed of light, the light from the clock can nolonger catch up to them. The faster he races through space, the slower he movesthrough time. This insight sparks the birth of Einstein's special theory ofrelativity, which says that space in time are deeply connected. In fact, theyare one in the same, a flexible fabric called space time.

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