From brewster's law for polarisation, it follows that the angle polarisation depends upon

Options

A. the wavelength of light
B. plane of polarisation's orientation
C. plane of vibrations orientations
D. None of above

Answer

To solve the question regarding Brewster's law for polarization and how the angle of polarization depends on certain factors, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Brewster's Law**: Brewster's law states that the angle of polarization (also known as Brewster's angle) is given by the formula:
\[ \theta_B = \tan^{-1} \left(\frac{n_2}{n_1}\right) \]
where \( \theta_B \) is the Brewster's angle, \( n_1 \) is the refractive index of the medium from which light is coming, and \( n_2 \) is the refractive index of the medium into which light is entering.

2. **Identifying the Variables**: From the formula, we can see that the angle of polarization depends on the refractive indices \( n_1 \) and \( n_2 \).

3. **Understanding Refractive Index**: The refractive index of a medium is a property that can change based on the wavelength of the light being used. This means that as the wavelength of light changes, the values of \( n_1 \) and \( n_2 \) can also change.

4. **Conclusion**: Since the angle of polarization is derived from the refractive indices, and these indices depend on the wavelength of light, we can conclude that the angle of polarization also depends on the wavelength of the light.

5. **Final Answer**: Therefore, the angle of polarization depends upon the refractive indices of the two media involved and indirectly upon the wavelength of the light.