You can try the first discovery and the 3D controls now. Stella unlocks every stage.
Tunneling: Through the Wall
Follow a wave packet as a terrain of probability that meets a barrier, decays exponentially inside its cross-section, and leaks through to the far side.
A hill of probability advances
A glowing hill advances slowly. This is terrain where the height is the probability of the particle’s “whereabouts” — in the sphere language of the previous chapters, a superposition spread over position. The top of the hill is “the most likely place to be found”; the particle is not shaped like the hill. First watch one round trip, the hill’s journey until it meets the wall.
Repeat the hill’s motion with replay and get a sense of what happens when it hits the wall.
You can try the first discovery and the 3D controls now. Stella unlocks every stage.