Quantization in physics refers to the process of transitioning from classical physics to quantum mechanics, where certain physical properties are restricted to discrete values rather than continuous ranges. This concept is foundational to quantum theory, which describes the behavior of matter and energy on very small scales, such as atoms and subatomic particles. Key aspects of quantization include: 1. **Energy Levels**: In quantum mechanics, systems like electrons in an atom can only occupy specific energy levels.
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Quantum field theory lecture by Tobias Osborne (2017) mentions that quantization is a guess.