← Index · 04·B9·D · № 047

Poster 04·B9·D for idea 04, “The extended present”: a light cone crossed by hyperbolas of equal spacetime interval.

№ 047 · 04·B9·D

The extended present

1905 · Special relativity

Idea
04 of 10
Layout
Route B · cluster · seed 130
Theme
dark · dark-paste texture
Drawing
The light cone at 45° with the hyperbolas t² − x² = c² and x² − t² = c² for c = 0.22, 0.44, 0.70 and 1; points on one curve share one spacetime interval.
Figures
Format
1680 × 2376 · 1 : 1.414 · AVIF 8 KB / 25 KB / 92 KB
Use
© 2026 Rantasalo & Co. Oy. CC BY-NC-ND 4.0: share unchanged, with credit, non-commercially. Photographs and textures: public domain (CC0), The Metropolitan Museum of Art Open Access.