Lensing near a wall
Hi guys, saw this effect at a trainstation. What causes this? Maybe changes in the refractive index due to temperature differences near the wall. Or this weird effect that makes shadows connect (Penumbra stuff idk).
Hi guys, saw this effect at a trainstation. What causes this? Maybe changes in the refractive index due to temperature differences near the wall. Or this weird effect that makes shadows connect (Penumbra stuff idk).