Niels Bohr — "The aim of atomic physics is to understand the world in which we live, and we ar…"
The aim of atomic physics is to understand the world in which we live, and we are ourselves a part of this world.
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More from Niels Bohr
"Physics is not about how the world is, it is about what we can say about the world."
"We are all agreed that the only way of getting a correct impression of the world is to be a part of it."
"Never express yourself more clearly than you are able to think."
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Understanding this quote
What it means
Studying atoms is not an abstract exercise separated from daily life. The point of probing matter's smallest pieces is to make sense of reality as a whole, including the observers doing the studying. Humans are not outside nature looking in; we are made of the same particles we investigate, so any real understanding must account for us too.
Relevance to Niels Bohr
Bohr built the first quantum model of the atom and spent decades wrestling with what measurement means when the observer shares the physics being measured. His complementarity principle argued that observer and observed cannot be cleanly separated. He also pushed science into public life, advocating open research and warning world leaders about nuclear weapons, embodying the scientist as participant.
The era
Bohr worked from the 1910s through the 1950s, when physics overturned classical certainty with quantum mechanics and relativity. World wars made atomic science a matter of human survival, not just curiosity. The Manhattan Project, which Bohr briefly joined, forced physicists to confront their direct role in shaping the world they studied, giving his insistence on human participation in physics urgent moral weight.
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