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Spacetime Lab
— fps
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Spacetime Lab
t₀
3.00
Auto-play
Scene
Basics (stretched units)
Light cones
Relativity of simultaneity
Boost the block
Twin paradox
"Now" slice
Speed
1.00
Display
Block outline
Light lines (45°)
Hyperbola grid
2D inset
Film strip
Show fps
Line radius
0.012
Readout
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