Answers to physics queries

"How does a Van der Graaf generator work?" No, we don't know either, but we did expect a coherent reply from the question box on the Institute of Physics website, physics.org, particularly when it tempts you with the sample question, "How does a laser work?" However, there is still plenty here for young scientists, like masses of activities, links to hundreds of biographies of physicists, history and help. physics.org

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