In Our Time Nuclear Physics
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Jan 10, 2002 Exploring the evolution of atom concept, unveiling mysteries of alpha particles, unraveling nuclear fission, and discussing fusion reactions in stars and labs. Delving into the advantages and challenges of nuclear fusion for sustainable energy production and its impact on technology and philosophy.
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Atom Structure
- Atoms are mostly empty space with a tiny, dense nucleus.
- This nucleus contains nearly all the atom's mass and is surrounded by electrons.
Divisible Atom
- J.J. Thompson's discovery of the electron in the 1890s showed that atoms are divisible.
- This contradicted the then-accepted belief that atoms were indestructible.
Rutherford's Experiment
- Rutherford used alpha particles to probe atoms, expecting them to pass through thin gold foil.
- Surprisingly, some bounced back, revealing a dense, positively charged nucleus.