A community for students.
Here's the question you clicked on:
 0 viewing
imron07
 3 years ago
What's paradox in twin paradox? And how do we explain that paradox?
imron07
 3 years ago
What's paradox in twin paradox? And how do we explain that paradox?

This Question is Closed

Carl_Pham
 3 years ago
Best ResponseYou've already chosen the best response.2The twin paradox is a relativity paradox, and goes like this: Jack and Jill are twins, both age 30. Jack gets in his spaceship and flies at 0.999c to Alpha Centauri and back, a distance of 4.4 light years. The trip therefore takes him 8.8 years as far as Jill is concerned, since Jack travels at essentially the speed of light, so that Jill is 38.8 years old when he returns. Since time dilates for Jack, however, he ages \[dt^{(\rm Jack} = {dt^{\rm Jill}}{\sqrt{1  v^2/c^2}} = 0.0447 dt^{\rm Jill}\] So Jack ends up only 0.39 years older. So far, so good: we all agree traveling at the speed of light, time slows down. But wait a minute  isn't motion relative? Couldn't we just as well say that it was Jill who left Jack, traveling at nearly the speed of light, and then returned to his location, and Jack who was motionless? What right do we have to say it was Jack who was in motion and Jill stationary? The resolution is to realize that if we want to compare Jack and Jill in the same reference frame, then one of them must be severely accelerated to depart that frame, and then return to it. If Jack is the one that gets slammed back into his seat by powerful rockets, to accelerate him to nearly the speed of light, and then slow him down again on his return to Earth, then clearly Jack's frame is very different from Jill's, since Jill experiences no such force. So Jack and Jill's situation is quite different, because their reference frames are quite distinguishable.

imron07
 3 years ago
Best ResponseYou've already chosen the best response.0@Carl_Pham Thanks, you're good at explaining :D

UnkleRhaukus
 3 years ago
Best ResponseYou've already chosen the best response.0it makes sense now
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.