Oppenheimer is the first blockbuster about nuclear weapons in a generation. Framing his film’s namesake with kinetic edits, fractured timelines, quantum imagery, and a pulsing score, director Christopher Nolan has crafted a stylistic triumph. But does Oppenheimer accurately depict its subject? And what is an “accurate” representation of the atomic bomb? Reactions from specialists have filtered in over the month since its release, and they are cautiously positive. Prominent nuclear researchers have praised Oppenheimer’s...