In Our Time Grand Unified Theory
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Feb 24, 2000 Exploring the clash between general relativity and quantum mechanics and the quest for a Grand Unified Theory. Discussing hidden dimensions and string theory, the significance of seven dimensions, and experimental evidence. Delving into a potential groundbreaking discovery in physics and the limits of understanding complex phenomena through string theory.
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Incompatibility of General Relativity and Quantum Mechanics
- Einstein's theory of general relativity and quantum mechanics are incompatible.
- General relativity describes gravity as gentle curves in space-time, while quantum mechanics describes a jittery, turbulent microscopic realm.
When Unification Matters
- Quantum mechanics and general relativity typically don't need to be unified for most scientific applications.
- Only extreme situations like the Big Bang or black holes require both, as gravity is negligible at atomic levels and quantum effects are negligible for large objects.
String Theory Explained
- String theory proposes tiny vibrating loops of energy as fundamental building blocks of matter.
- Different vibration patterns correspond to different particles, like musical notes on a stringed instrument.