Demonstration device of Galileo experiment of two iron balls touching the ground simultaneously

The utility model discloses a demonstration device of a Galileo experiment of two iron balls touching the ground simultaneously. The demonstration device comprises an upper cover and a lower base between which a transparent vacuum glass cylinder is connected, the upper cover is internally provided with an electromagnet which attracts two iron balls to grooves on a lower bottom surface of the upper cover through an on/off key, corresponding circular plates are arranged on an upper surface of the lower base, bottom surfaces of the circular plates are provided with iron needle vertical rods, compression springs sleeve the iron needle vertical rods, conductive wire mesh layers are arranged under the springs, gaps exist between tail ends of the iron needle vertical rods and the conductive wire mesh layers, the on/off key is connected with the electromagnet and a power socket on an outer side wall of the lower base, and the power socket is sequentially connected with an indicator light, the conductive wire mesh layers and the iron needle vertical rods in series. Through the demonstration device of the Galileo experiment of two iron balls touching the ground simultaneously, demonstration of the Galileo experiment of two iron balls falling to the ground simultaneously is realized in reality, observation and understanding are easy, the operation is convenient, and the design is simple.