What's in the junior high school physics experiment equipment box?

There are many kinds of physics experiment equipment boxes in junior middle schools, including mechanical experiments, optical experiments and electrical experiments.

Among them, the main equipment in the mechanical experiment box is a balance, a stopwatch, a spring dynamometer and a communicator. There are many devices in the electrical experiment box of barometer, including ammeter, voltmeter, sliding rheostat, electronic resistor, wire, bulb, ionization, and motors, magnets, glass rods, rubber rods, and many kinds of switches.

There are also many optical experimental equipments, such as pinhole imaging, convex lens, concave lens, convex mirror and concave mirror. There are also light sources, there are three kinds of monochromatic light or laser.