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Value
Quantity
Symbol
Value
Uncertainty
Speed of light in vacuumC

299 792 458 m·s-1

Defined

Electric Constant (permittivity of free space)

ε0

8.85418781times10^{-12}

Defined
magnetic constant (permeability of free space)

υ0

1.2566 370 614... × 10-6 N·A-2Content 3 4