english: Light: it's the fastest thing in the universe, but we can still measure its speed if we slow down the animation, we can analyze light's motion using a space-time diagram, which takes a flipbook of animation panels, and turns them on their side.
non_english: Svetlost. To je najbrža stvar u svemiru, ali ipak možemo izmeriti njenu brzinu. Ako usporimo animaciju, možemo da analiziramo kretanje svetlosti koristeći prostorvremenski dijagram, koji koristi kinograf sa poljima za animaciju i okreće ih na stranu.