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- α
- coupling constant
- structure constant
- fine structure constant
- ''α''
- C-137
- Fine-structure constant
- Sommerfeld fine-structure
- Sommerfeld's constant
- a spatial variation in four measurements of the fine-structure constant
- Varying Constants
- electromagnetic coupling constant
- fine structure \"constant\"
- fine-structure constant
- finestructure constant
- inverse fine-structure constant
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