Question

who invented free electron theory in metals​

Answer 1

Answer:

Lorentz

The classical free electron theory was introduced by P. Drude in 1900 and developed by Lorentz in 1909 to explain electrical conduction in metals.

Answer 2

Lorentz invented free electron theory in metals

The classical free electron theory was introduced by P. Drude in 1900 and developed by Lorentz in 1909 to explain electrical conduction in metals.

Extra information:

Paul Drude proposed classical free electron theory.

Paul Drude proposed classical free electron theory. A classical free electron theory is a macroscopic theory proposed by Paul Drude in 1900. After the discovery of electron by JJ Thomson, this theory was elaborated by Lorentz in 1909. Hence this theory is also known as Drude & Lorentz.