What Is Time Dilation?
Time dilation is a physical phenomenon: among two identical clocks, the person holding the clock A will find that the clock B moves slower than himself. This phenomenon is often said to be the counterpart's clock "slowing down", but this description is only correct in the observer's frame of reference. Any local time (that is, the time measured by an observer on the same coordinate system) is moving at the same speed. The time dilation effect applies to any process that accounts for changes in time velocity.
- The formula for measuring time expansion in special relativity is:
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- Time-expansion experiments have been done many times. Since the 1950s
- According to the time expansion effect, when an astronaut is in a spacecraft moving at a very high speed relative to an observer on the earth, for the observer of the earth, although the earth has gone through a long time, the people in the spacecraft are not aging because Extreme speed slows down the spacecraft (and everything in it). In other words, observers on Earth will find that when the clock of the spacecraft has made one revolution, the clock on the earth has already made many revolutions. As long as the speed is high enough, this effect will be obvious. For example, it may be ten hours for observers on Earth, but the space traveler s watch has only gone for an hour. This effect is symmetrical for the two coordinate systems of the spacecraft or the earth, because the earth sees the spacecraft moving, the spacecraft sees the earth moving, and the speeds are equal. In other words, for astronauts, Earth s time is slower. It may take ten minutes for the spacecraft's clock, but the astronauts have discovered that the clock on the earth has only passed one minute (see the following paragraphs and
- Four-dimensional vector
- General relativity
- Lorentz transform
- Minkowski Space Time
- Special relativity
- Twins paradox