An optical tool called a polariscope is used to investigate the polarisation of light. Using a light source before the first filter and an analyzer in front of the second filter, it typically comprises two polarising filters positioned at right angles to one another. The polariscope can provide details about the structure and makeup of materials that impact the polarisation of light traveling through them by observing changes in the brightness and color of the transmitted light. Polariscopes are frequently employed in the study of stress and strain in materials as well as in the domains of materials science, mineralogy, and geology. visit:- https://www.perfectgroupindia.co.in/polariscope.php

1. Polariscope
Polariscope is a scientific instrument used
to study the optical properties of materials.
It is widely used in various industries,
including gemology, plastics, and glass
manufacturing.
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2. History of Polariscope
Polariscope was invented in the 19th century by Étienne-Louis Malus, a French
physicist. He discovered the polarization of light in 1808 and developed the first
polariscope in 1810. Since then, Polariscope has been used extensively in various fields
of science and industry. The polarized light reflects off the sample and is then analyzed
by the analyzer. This type of Polariscope is used to study the birefringence of opaque
materials.

3. Birefringence
and Optical Path
Difference
Birefringence is the property of materials that have
two different refractive indices for polarized light.
When polarized light passes through a birefringent
material, it splits into two waves, each with a different
velocity and polarization. Optical path difference is
the difference in the length of the optical path
traversed by the two waves of polarized light passing
through a birefringent material. The optical path
difference determines the interference pattern
observed through the polariscope.

4. Types of Polariscope
Transmission Polariscope
In transmission Polariscope, the light source is placed behind the polarizer, and the sample is placed between the
polarizer and the analyzer. The polarized light passes through the sample and is then analyzed by the analyzer.
Reflection Polariscope
In reflection Polariscope, the light source is placed in front of the polarizer, and the sample is placed in contact
with the analyzer. The polarized light reflects off the sample and is then analyzed by the analyzer. This type of
Polariscope is used to study the birefringence of opaque materials.

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