The intensity of the light from a bulb incident on a surface is 0.22 W / m^2. The amplitude of the magnetic field in this light-wave is \ \ \ \ ×…

The intensity of the light from a bulb incident on a surface is $\displaystyle 0.22 \mathrm{~W} / \mathrm{m}^2$. The amplitude of the magnetic field in this light-wave is \_\_\_\_ $\displaystyle \times 10^{-9} \mathrm{~T}$. (Given : Permittivity of vacuum $\displaystyle \epsilon_0=8.85 \times 10^{-12} \mathrm{C}^2 \mathrm{~N}^{-1}-\mathrm{m}^{-2}$, speed of light in vacuum $\displaystyle \mathrm{c}=3 \times 10^8 \mathrm{~ms}^{-1}$ )