After a short recall of our previous standing wave approach to the Casimir force problem, we consider Lifshitzs temperature Greens function method and its virtues from a physical point of view. Using his formula, specialized for perfectly reflecting
mirrors, we present a quantitative discussion of the temperature effect on the attractive force.
We derive the Casimir force expression from Maxwells stress tensor by means of original quantum-electro-dynamical cavity modes. In contrast with similar calculations, our method is straightforward and does not rely on intricate mathematical extrapolation relations.
