The intensity of the light from a bulb incident on a surface is 0.22 W/m². The amplitude of the magnetic field in this light-wave is ______________ $\times$ 10^$-$9 T.

(Given : Permittivity of vacuum $\in$₀ = 8.85 $\times$ 10^$-$12 C² N^$-$1-m^$-$2, speed of light in vacuum c = 3 $\times$ 10⁸ ms^$-$1)