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.
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.
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.
