This note solves Eqs. (1) to (7) to show that a vector potential plane wave in electromagnetism is accompanied in ECE2 by a space like spin connection plane wave. The time like component of the spin connection is zero. This result is true both for electomagnetism and gravitation, because the spin connection is a fundamental property of spacetime, the aether or vacuum. So there are aether plane waves. These quantize to vacuum particles, introduced earlier in the ECE2 series of papers. This result illustrates that ECE2 is a rigorously self consistent theory.