There are three symbols that you will find on the bottom of your pan. These symbols are the international symbols for cookware. They are the symbols for cooking on a gas stove, an electric stove, and in a microwave.
The first symbol is a wavy line. This is the symbol for cooking on a gas stove. The wavy line represents the flame of the stove.
The second symbol is a circle with a dot in the center. This is the symbol for cooking on an electric stove. The circle represents the heating element of the stove. The dot in the center represents the heat that is being generated by the element.
The third symbol is a square with a wave in the center. This is the symbol for cooking in a microwave. The square represents the microwaves that are used to cook the food. The wave in the center represents the waves that are generated by the microwaves.