The "One Machine, Multiple Phenomena" polarization optics teaching kit designed specifically for middle schools, universities, and science popularization venues can complete qualitative or quantitative demonstrations of several classic experiments within 5 minutes. Typical experimental example: Verification of Marius' Law: Rotating analyzer, screen synchronously displays light intensity curve; Brewster angle measurement: The sliding platform changes the incident angle, and when the reflected light is completely extinguished, the angle is automatically locked and the refractive index is calculated ; Fun demonstration of "Wall Piercing Technique": Using a vertical polarizer to create a "black wall", the ball passes through an acrylic tube, and students intuitively understand polarization shielding.