# Cause of polarisation due to reflection?

• Wrichik Basu
In summary, Resnick and Halliday's Fundamentals of Physics (page 912) states that reflected light is partially polarized, with unequal magnitudes of parallel and perpendicular components of the electric field. At the Brewster angle, the reflected light is completely plane polarized. This polarization is a bulk property of the material's index ## n ## and is not related to atomic properties. The Fresnel relations are derived using Maxwellian boundary conditions. Further information can be found at the provided source.
Wrichik Basu
Gold Member
Quoting Resnick and Halliday's Fundamentals of Physics (page 912) on polarization by reflection:
In general, the reflected light also has both components (the parallel and perpendicular components of Electric Field) but with unequal magnitudes.This means that the reflected light is partially polarized—the electric fields oscillating along one direction have greater amplitudes than those oscillating along other directions.
It is also known that when light is incident at the interface at a particular angle θb, the Brewster angle, the reflected light is completely plane polarized.

Why does light get polarized when it gets reflected? What interaction on the atomic scale results in a polarised reflected light?

How can this be interpreted quantum mechanically?

I searched on Google, got this answer, but it's not satisfactory. Can anyone provide a better answer or source?

Last edited:
Wrichik Basu

## 1. What is polarisation due to reflection?

Polarisation due to reflection is a phenomenon where a wave of light or other electromagnetic radiation is restricted to a single plane of oscillation. This occurs when a wave reflects off of a surface at a particular angle, causing the electric field to only vibrate in a specific direction.

## 2. What causes polarisation due to reflection?

Polarisation due to reflection is caused by the selective absorption and reflection of light waves. When a wave reflects off of a surface, the electric field can be absorbed and reflected in different directions, resulting in polarisation.

## 3. How does polarisation due to reflection affect light?

Polarisation due to reflection can affect light by altering its properties, such as intensity and direction. This can be observed in various phenomena, such as glare from water and reflections off of car windows.

## 4. Can polarisation due to reflection be controlled?

Yes, polarisation due to reflection can be controlled through the use of polarising filters. These filters are designed to allow only specific polarised light waves to pass through, resulting in a reduction or elimination of polarised light.

## 5. What are the applications of polarisation due to reflection?

Polarisation due to reflection has various applications in fields such as optics, photography, and telecommunications. It is also used in polarising sunglasses to reduce glare and improve visibility. In addition, polarised light is used in scientific experiments to study the properties of light and other electromagnetic radiation.

• Optics
Replies
6
Views
2K
• Optics
Replies
4
Views
2K
Replies
8
Views
1K
• Optics
Replies
5
Views
2K
• Optics
Replies
7
Views
3K
• Optics
Replies
1
Views
914
• Optics
Replies
7
Views
2K
• Optics
Replies
1
Views
1K
• Optics
Replies
6
Views
13K
• Introductory Physics Homework Help
Replies
1
Views
207