A steam turbine is a device that converts the energy from steam into mechanical work. It operates by directing high-pressure steam onto blades attached to a rotor. As the steam expands and cools, it causes the rotor to spin, generating rotational energy that can be used to drive generators or other machinery. Steam turbines are commonly used in power plants to produce electricity. They are efficient and can operate on various fuels, including coal, natural gas, and nuclear energy. The steam is typically produced in a boiler, where water is heated to create high-pressure steam, which is then channeled to the turbine.