On Coherence Properties of Light Waves

摘要: The electric field of a luminous region is much more regular than generally realized. Phases vary periodically and predictably, the nature polarization remains approximately constant, for times order reciprocal line width in cycles per second. In plane at right angles to mean direction propagation light wave coherent over an area λ2/Ω, where Ω solid angular spread light. These ideas, when applied problem producing beats between lightwaves, lead signal amplitude which has been verified experimentally.