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The phenomenon occurring in the special theory of relativity wherein two observers who start together with identical clocks and then undergo different motions can have different total elapsed time on their clocks when they rejoin later.

clock paradox (plural clock paradoxes) (relativity) The phenomenon in which two observers who start together with identical clocks, follow different timelines, and then rejoin can have different elapsed times on their clocks, especially if one travels at a relativistic speed.

In physics, the twin paradox is a thought experiment in special relativity involving identical twins, one of whom makes a journey into space in a high-speed rocket and returns home to find that the twin who remained on Earth has aged more.

Conclusion.

Event Earth (years) Spaceship (years)
Arrival 10 6

In this supposed paradox, one of two twins travels at near the speed of light to a distant star and returns to the earth. … The paradox lies in the question “Why is the traveling brother younger?” Special relativity tells us that an observed clock, traveling at a high speed past an observer, appears to run more slowly.

## Why is time dilation a paradox?

Special relativity tells us that an observed clock, traveling at high speed past an observer, appears to run more slowly–that is, it experiences time dilation. … But the acceleration incurred by the traveler is incidental, and the paradox can be unraveled by special relativity alone.

## Is the twin paradox true?

The twin paradox is real as the traveling twin will see the Earth clock moving as slowly as the twin on the Earth. Yes, it is real but shouldn’t really be called a paradox.

## What is the twin paradox and how is it resolved?

The so-called “twin paradox” is easily resolved by noting that there is a physically meaningful disinction between the experiences of the two twins during the trip.

## How many types of paradoxes are there?

Eugene P. A falsidical paradox says an arrow can never actually reach its target. There are four generally accepted types of paradox. The first is called a veridical paradox and describes a situation that is ultimately, logically true, but is either senseless or ridiculous.

Though thought experiments about time travel date back centuries, the bootstrap paradox comes from Robert Heinlein’s story “By His Bootstraps.” It was published in the October, 1941 issue of the Astounding Science Fiction magazine under the pseudonym Anson MacDonald.

## What is the twin paradox example?

For example, suppose that one of two identical twin sisters flies off into space at nearly the speed of light. … According to relativity, time runs more slowly on her spacecraft than it does on Earth; therefore, when she returns to Earth, she will be younger than her Earth-bound sister.

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## Can time be defined?

Physicists define time as the progression of events from the past to the present into the future. … Time can be considered to be the fourth dimension of reality, used to describe events in three-dimensional space. It is not something we can see, touch, or taste, but we can measure its passage.

## Does time on earth differ with the time in outer space why?

We all measure our experience in space-time differently. That’s because space-time isn’t flat — it’s curved, and it can be warped by matter and energy. … That’s why time passes slower for objects closer to the center of the Earth where the gravity is stronger.