# Why do we ignore magnetic field vector during polarization?

Most light sources in nature emit unpolarized light. Natural light sources consist of very large number of randomly oriented atomic emitter, which emit polarized light randomly. A linear polarizer is a device whose input is light of any polarization state and output is linearly polarized light. Natural light can be represented by 2 independent orthogonally linearly polarized wave of the same amplitude,

$$E_{x}(t)=E_{0}sin(\omega t)$$ $$E_{g}(t)=E_{0}sin(\omega t+\varepsilon )$$

In this case, intensity =$$E_{0}^{2}$$ and each linearly polarized component contributes $$\frac{(E_{0}^{2})}{2}$$

My question is why is only E considered in polarization and not B. Thank You!