Twin Paradox Calculator
Calculate age difference in the twin paradox scenario
About this calculator
The Twin Paradox Calculator determines the age difference between twins when one travels at relativistic speeds while the other remains stationary. This famous thought experiment from Einstein's special relativity theory demonstrates time dilation effects at high velocities. The calculator computes how much younger the traveling twin becomes compared to the Earth-bound twin, helping students and physics enthusiasts understand this counterintuitive relativistic phenomenon through practical calculations.
How to use
Enter the traveling twin's velocity as a fraction of light speed, the duration of the journey from Earth's perspective, and optionally the initial ages of both twins. The calculator applies the Lorentz factor to determine time dilation and computes the final age difference between the twins when the traveler returns.
Frequently asked questions
What velocity is needed to see significant time dilation effects?
Noticeable time dilation occurs above 10% light speed, with dramatic effects becoming apparent at 50% light speed or higher.
Why does only the traveling twin age slower?
The traveling twin experiences acceleration and deceleration, breaking the symmetry and making them the one who ages less according to relativity.
Is the twin paradox just theoretical?
No, time dilation has been experimentally verified with atomic clocks on airplanes and is essential for GPS satellite accuracy.