![]() ![]() It has nothing to do with energy release. why are some orbits stable and some not?).ġ915: Einstein publishes his General Theory of Relativity, which is essentially a theory of gravity. This resolves some of the problems with Rutherford's model but raises new questions (e.g. alpha particles) as experimental tools.ġ913, Bohr modifies Rutherford's atomic model, replacing the whirring electrons with electrons in stable orbits that make "quantum leaps" between orbits. This work is important both for its establishment of an influential (if problematic) atomic model, but also its illustration of the value of using radioactive particles (e.g. do experiments which imply that atoms contain most of their mass in a centralized nucleus, surrounded by whirring electrons. (Neither have anything specific to do with atomic bombs.)ġ909, Rutherford et al. The two papers that get the most attention from this series is the one on the photoelectric effect, which helps establish the physical reality of the "quantum," and his work on the Lorentz contraction which discards with the idea of a preferred "rest frame" and the aether. It is interesting but has no obvious applications. One of them derives the mass-energy relationship. They also start some of the first experiments to modify atomic compositions.ġ905, Einstein publishes his four papers that constitute Special Relativity. 1900 that this is because of atomic transmutation, i.e. radium, the amount of energy being released is tremendous compared to the volume of the atoms in question - that it is much, much more energetic than any chemical combustion, but it is hard to extract that energy because you can't make it all be released at once. They recognize that in some substances, e.g. The Curies look into this and dub the phenomena radioactivity. People say, "whoa, there is a whole invisible physical world to probe!"ġ898, Becquerel finds that X-ray like emissions come out of uranium. Since you seem interested primarily in the historical context of making atomic bombs, here's a rough overview with relation to Einstein:ġ895, Röntgen discovers X-rays. Previous AMAs | Previous Roundtables Featuresįeature posts are posted weekly. May 25th | Panel AMA with /r/AskBibleScholars Please Subscribe to our Google Calendar for Upcoming AMAs and Events To nominate someone else as a Quality Contributor, message the mods. Our flaired users have detailed knowledge of their historical specialty and a proven record of excellent contributions to /r/AskHistorians. Please Read and Understand the Rules Before Contributing. Report Comments That Break Reddiquette or the Subreddit Rules. Serious On-Topic Comments Only: No Jokes, Anecdotes, Clutter, or other Digressions. ![]() Provide Primary and Secondary Sources If Asked. Write Original, In-Depth and Comprehensive Answers, Using Good Historical Practices. Questions should be clear and specific in what they ask, and should be able to get detailed answers from historians whose expertise is likely to be in particular times and places. ![]() Nothing Less Than 20 Years Old, and Don't Soapbox. Be Nice: No Racism, Bigotry, or Offensive Behavior. Downvote and Report comments that are unhelpful or grossly off-topic.Upvote informative, well sourced answers.New to /r/AskHistorians? Please read our subreddit rules and FAQ before posting! Apply for Flair ![]()
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