Modern & Quantum Physics
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Time Dilation

Moving clocks run slow.

Formula

Δt=Δt01v2/c2\Delta t = \frac{\Delta t_0}{\sqrt{1 - v^2/c^2}}

Variables

\Delta t_0Proper time
vSpeed
cLight speed

Did You Know?

GPS satellites must correct for time dilation, or their clocks would drift enough to ruin navigation within a day.