Permeability of free space

Permeability of free space, symbolized as μ₀, is a constant that describes how easily magnetic fields can form and pass through empty space. It essentially measures the ability of space itself to support magnetic field lines. The value of μ₀ is exactly 4π × 10⁻⁷ henries per meter (H/m). This constant is fundamental in physics because it relates magnetic field strength to the electric currents and magnetic forces involved, playing a key role in electromagnetic theory and the behavior of fields in a vacuum.