Sample interview questions: Can you discuss your knowledge of different theoretical approaches to particle physics, such as string theory or loop quantum gravity?
Sample answer:
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String Theory:
- Proposes that the fundamental constituents of the universe are not point-like particles, but tiny, vibrating strings.
- Different modes of vibration correspond to different types of particles.
- String theory is a unified theory, meaning it attempts to describe all the forces and particles in the universe within a single framework.
- String theory is very complex and mathematically challenging.
- It has not yet been experimentally tested.
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Loop Quantum Gravity:
- Proposes that space and time are not continuous, but instead are made up of tiny, discrete loops.
- The geometry of spacetime is determined by the arrangement of these loops.
- Loop quantum gravity is a unified theory, like string theory.
- It is also very complex and mathematically challenging.
- It has not yet been experimentally tested.
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