The similarities between the hypothetical medium of light propagation, the aether, and the Dirac-type negative sea are discussed. In particular, it is argued that when the negative sea is identified as the observer's reference frame, it may be equivalent to the medium of light waves. In fact, this equivalence is related to the natural interpretation of the wave-particle duality where the light wave is propagating through the reference frame of the observer, i.e., the wave-like property, while the particle-like aspect is shown as the eigenvalue outcome of the measurement. This result lies within standard quantum theory, yet removes the weirdness of the wave-particle duality that existed previously.

Computation, Information, Duality