The Brewster angle is
independent of the intensity of light. It only depends on the
refractive indices of the two media (the medium the light is coming from and the medium it is entering).
To clarify: when light hits a surface at the Brewster angle, the reflected light is completely polarized perpendicular to the plane of incidence. This angle is calculated using the refractive indices of the two media involved, and is given by:
\[
\tan(\theta_B) = \frac{n_2}{n_1}
\]
Where:
- \( \theta_B \) is the Brewster angle
- \( n_1 \) and \( n_2 \) are the refractive indices of the first and second media, respectively.
So, the Brewster angle depends only on the properties of the materials, not on how bright the light is.