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"The fundamental concept in physics is an event. An event is specified not only by a place but also by a time of happening. "

"The interval between two events is zero when they can be connected by the one light ray. The invariance of the interval-its independence from the choice of the reference frame-forces one to recognize that time can not be seperated from space. Space and time are part of the single entity, spacetime. Space is different for different observers. Time is different for different observers. Spacetime is the same for everyone."

"Only in 1905 did we learn that the time difference between the second event and the first event, really has different values, t and t', for observers in different states of motion. "

"The problem of understanding relativity is no longer one of learning but one of intuition-a practiced way of thinking. With this way of seeing, a remarkable number of otherwise incomprehensible experimental results are seen to be perfectly natural."


국내에 번역되지 않았서
원서(Spacetime Physis/휠러)의 내용을 타이핑 했습니다.

평생을 상대성연구에 몰두한 존 훨러교수의 표현들입니다.

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