 This paper provides an introduction to electromagnetically induced transparency, EIT, which is a technique used to manipulate light waves through the use of magnetic fields. It explains the basic principles behind EIT, including its effects on optical absorption and dispersion, as well as the impact of thermal motion on these parameters. The paper also discusses the trade-offs between different experimental setups and the potential applications of EIT. This article was authored by Rand Finkelstein, Samir Bali, Ofer Firstenberg, and others.