Liquid optical rotation effect demonstration device and method

The invention relates to a liquid optical rotation effect demonstration device which comprises a container, a birefringent crystal, a polarizer and a light source. Transparent optical rotation liquid is placed in the container, the bottom of the container is transparent, the birefringent crystal is suspended in the optical rotation liquid through a lifting rope, the polarizer is arranged at the bottom of the container, and the light source is arranged at the bottom of the polarizer. The imaging change of the light source is observed through the birefringent crystal at the top of the container by changing the height of the birefringent crystal in the optical rotation liquid in the container, and brightness and position display change of the light source penetrating the polarizer caused by the optical rotation effect of the birefringent crystal in the optical rotation liquid can be clearly seen. The liquid optical rotation effect demonstration device is simple in structure, the optical rotation effect can be vi