There is a small solar panel on it which converts light energy into electrical energy, and then converts the electrical energy into magnetic field to achieve oscillation using the principle of like pole repulsion. If you have the conditions, you can open. and see what's available at auto detailing stores. It's as cheap as 10 yuan
What is the principle that sunlight on a car can cause the decorations to swing?
Introduction What is the principle behind the decorations on a car swinging when the sun shines on them? There is a small solar panel on the car that converts light energy into electrical energy and then passes the electrical energy through.