James Clerk Maxwell FRS FRSE was a Scottish theoretical physicist. His most prominent achievement was formulating classical electromagnetic theory. This unites all previously unrelated observations, experiments, and equations of electricity, magnetism, and optics into a consistent theory. Maxwell's equations demonstrate that electricity, magnetism and light are all manifestations of the same phenomenon, namely the electromagnetic field. Subsequently, all other classical laws or equations of these disciplines became simplified cases of Maxwell's equations. Maxwell's achievements concerning electromagnetism have been called the "second great unification in physics", after the first one realised by Isaac Newton.
Maxwell demonstrated that electric and magnetic fields travel through space in the form of waves and at the constant speed of light. In 1865, Maxwell published A Dynamical Theory of the Electromagnetic Field. It was with this that he first proposed that light was in fact undulations in the same medium that is the cause of electric and magnetic phenomena. His work in producing a unified model of electromagnetism is one of the greatest advances in physics.
Feast of Luke the Evangelist Almighty God, who created humanity after your image and gave them living souls that they may seek you and rule your creation, teach us so to investigate the works of your hand that we may subdue the earth to our use, and strengthen our intelligence for your service. And grant that we may so receive your Word as to believe in him whom you sent to give us the science of salvation and the forgiveness of our sins. All this we ask in the name of the same Lord Jesus Christ. Amen.