Polarization is the process of transforming unpolarized light into polarized light. Light can be polarized through transmission, reflection, refraction, or scattering. Polarized light has many applications including reducing glare in sunglasses, performing stress analysis in engineering, and enabling 3D viewing through special glasses. Polarizers are also used to determine properties like the size and shape of viruses and in various industrial applications.

1. POLARIZATION
Prepared by:
 NUR AZRINA BT ZAINI
 NUR HAZIRAH BT AZHARI

2. Introduction of polarisation
• Understanding polarization and how to measure a
change in its state is important in many applications.
• Polarizers can be used to measure changes in
magnetic fields, temperature, molecular structure,
chemical interactions, and acoustic vibrations.
• Polarizers can be utilized in imaging applications to
reduce glare and hot spots, enhance contrast, and
perform stress evaluation.

3. What is polarization?

4. definition
• The process of transforming unpolarized light
into polarized light is known as polarization

5. Methods of polarizing light
• Polarization by Transmission
• Polarization by Reflection
• Polarization by Refraction
• Polarization by Scattering

6. By transmission

7. By Reflection

8. By refraction

9. By scattering

10. Applications of polarized light
• Polaroids are used in sun glasses. They reduce the intensity and the
glare by cutting down the horizontally polarized light.
• Polarized light is used in photo elastic stress analysis.
• For 3-D view, special type of glasses, which have polaroids with
perpendicular axes, are used.
• Polarized light is useful to determine size and shape of viruses.
• This polarized light finds many practical applications in industry and
engineering science.

11. Application of polarisation

12. Uses of polaroids
• These reduce excess glare and hence sun glasses are fitted with
Polaroid sheets.
• These are also used to reduce headlight glare of cars.
• They are used to improve color contrast in old oil paintings.
• These are useful in 3-D motion pictures i.e., holography.
• Wind shields of automobiles are also made of Polaroid sheets.