EngiRef / Constants

Fine Structure Constant

Dimensionless. Characterizes electromagnetic interaction strength.

fundamentalα

Source Details

Id

alpha

Name

Fine Structure Constant

Symbol

α

Value

0.0072973525693

Unit

Not provided

Category

fundamental

Description

Dimensionless. Characterizes electromagnetic interaction strength.

Constants

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Source collection

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fundamentalc

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Avogadro's Constant

Exact defined value in SI. Particles per mole.

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Gravitational Constant

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fundamentalG