Oppenheimer ending explained

What happens

Strauss's confirmation is rejected, exposing that he engineered Oppenheimer's downfall. Then the film returns to the pond: Oppenheimer tells Einstein he fears he started a chain reaction that will destroy the world.

The last image

After the pond talk, Oppenheimer pictures the earth consumed by chain reactions of fire, spreading across the globe.

What it says

Justice for Oppenheimer comes too late to matter. The real verdict is his own: he cannot take back what he made. The film ends on his vision, not a vindication, because the consequences are still unfolding.