A major plot element is Oppenheimer's response to the long-term consequences of his actions. Nolan wished to explore the phenomenon of delayed reactions, as he felt people are not "necessarily confronted with the strongest or worst elements of [their actions] in the moment". He also chose to alternate between scenes in color and black-and-white to convey the story from both subjective and objective perspectives, respectively, with most of Oppenheimer's view shown via the former, while the latter depicts a "more objective view of his story from a different character's point of view". Wanting to make the film as subjective as possible, the production team decided to include visions of Oppenheimer's conceptions of the quantum world and waves of energy. Nolan noted that while Oppenheimer never publicly apologized for his role in the atomic bombings of Hiroshima and Nagasaki, he still believed Oppenheimer had felt genuine guilt for his actions and thus portrayed him as exhibiting those feelings.