To study polarization of light using He-Ne Laser
1.https://www.iitr.ac.in/departments/PH/uploads/Teaching%20Laboratory/11%20Polarization%20of%20light.pdf
2.https://groups.physics.northwestern.edu/lab/third/polarization.pdf
3.https://courses.lumenlearning.com/physics/chapter/27-8-polarization/
4.https://www.microscopyu.com/techniques/polarized-light/introduction-to-polarized-light
5.https://www.york.ac.uk/media/physics/publicandschools/Polarisation%20of%20Light.pdf