What is a Polariscope, and how does it help in analyzing material stress?

A Polariscope is a crucial optical device used to analyze stress patterns in transparent materials like glass and plastic. By passing polarized light through a material, it reveals internal stress through color patterns, aiding in quality control and ensuring material strength. It is widely used in industries like automotive, manufacturing, and packaging to detect stress points that could lead to defects or failure, making it essential for enhancing product durability.