Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Re-reading; I find myself thinking if light, being EM in the humanly visible spectrum, may possess gravity - does a magnetic field also possess gravity?

share|cite|improve this question
up vote 3 down vote accepted

Per wikipedia, the electromagnetic tensor $F^{\mu \nu}$ contributes to the stress energy tensor $T^{\mu \nu}$ by

$$T^{\mu \nu} = \frac{1}{\mu_0} \left(F^{\mu \alpha} g_{\alpha \beta} F^{\nu \beta} - \frac{1}{4} g^{\mu \nu} F^{\gamma \delta} F_{\gamma \delta} \right)$$

The Einstein equations govern how the stress-energy tensor is coupled to spacetime curvature. Since the magnetic field is entirely captured by the electromagnetic tensor, the answer is yes, magnetic fields contribute to gravitation.

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.