Sign up ×
Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. It's 100% free.
Those are the equations governing electromagnetism. –  HDE 226868 Aug 29 '14 at 22:45
The version I am familiar with was more explicit. It says "And God said", followed by Maxwell's equations, followed by … "and there was light.". A direct play on Genesis 1:3 ("And God said, “Let there be light,” and there was light.") –  Floris Aug 30 '14 at 0:52
You must have had a really good camera to get a very detailed (and creepy) picture of a middle school teacher (don't know how you knew it was a middle school teacher) from across the street. Oh, the wonders of modern technology (and physics, light physics)! –  seventeen years a bmw Aug 30 '14 at 2:53
Related: –  Chris White Aug 30 '14 at 3:55
God may not have said that, for God would probably not likely to use SI unit. Instead, he would prefer the "God given units". –  buzhidao Jun 22 at 8:16

1 Answer 1

up vote 12 down vote accepted

As most people know, "let there be light" is a famous biblical quote, from Genesis. Now, on to the teacher's shirt.

Those equations on his back are Maxwell's equations. "Let there be light" is a joke, because Maxwell's equations describe electromagnetic fields, and light is a form of electromagnetic radiation, so the equations can be used to describe light.

So, as a physicist, one could (jokingly) say that God's "let there be light" refers to him 'inventing' Maxwell's equations.

share|cite|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.