Twin Paradox: Time & Speed Explained

Thread starter radioactive8
Start date Aug 28, 2012
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Paradox Twin paradox

In summary, the "Twin Paradox" is a thought experiment in physics that explores the concept of time dilation in the theory of relativity. It involves two identical twins, one who stays on Earth and one who travels through space at high speeds. Time dilation occurs in the Twin Paradox due to the effects of velocity on time, with the traveling twin experiencing time at a slower rate than the twin on Earth. This paradox is considered paradoxical because it challenges our common-sense understanding of time. While the Twin Paradox can be observed in real life through experiments with high-speed particles, it serves as a demonstration of the key principle of the theory of relativity - time is relative to the observer's frame of reference.

Aug 28, 2012

radioactive8

hi .. i don't understand in the twin paradox and in general and special relativity why time changes if speed changes
thank you

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Aug 28, 2012

ghwellsjr

Science Advisor

Gold Member

Why don't you click on the links at the bottom of this page to get some answers.

You do realize that this is probably the most answered question on this forum, don't you?

Related to Twin Paradox: Time & Speed Explained

1. What is the "Twin Paradox"?

The "Twin Paradox" is a thought experiment in physics that explores the concept of time dilation in the theory of relativity. It involves two identical twins, one who stays on Earth and one who travels through space at high speeds. When the traveling twin returns, they have experienced less time compared to the twin on Earth, resulting in a difference in their ages.

2. How does time dilation occur in the Twin Paradox?

Time dilation occurs in the Twin Paradox due to the effects of velocity on time. According to the theory of relativity, time slows down for an object that is moving at high speeds. This means that the traveling twin experiences time at a slower rate than the twin on Earth, resulting in a difference in their ages when they reunite.

3. Why is the Twin Paradox considered paradoxical?

The Twin Paradox is considered paradoxical because it challenges our common-sense understanding of time. In the paradox, the traveling twin appears to experience less time, but according to their own perspective, they are experiencing time normally. Therefore, it seems paradoxical that two events (the twins' ages) can be both equal and unequal at the same time.

4. Can the Twin Paradox be observed in real life?

Yes, the Twin Paradox has been observed in real life through experiments with high-speed particles. For example, muons, which are subatomic particles, have a short half-life but can travel at near the speed of light. When they do, they experience time dilation, and their lifespan appears to be extended from our perspective on Earth.

5. How does the Twin Paradox relate to the theory of relativity?

The Twin Paradox is a thought experiment that demonstrates one of the key principles of the theory of relativity - time dilation. This theory states that time is not absolute, but is relative to the observer's frame of reference. The Twin Paradox shows how time can be perceived differently for two observers in different frames of reference, which is a fundamental concept in the theory of relativity.