Cold wave

appropriate circumstances. In the case of some of the terms that refer or purport to refer to physical objects, the value of analogy is more limited still than in the molecular instance. Thus in the physics of light, with its notoriously mixed metaphor of wave and particle, the physicist's understanding of what he is talking about must depend almost wholly on context: on knowing when to use various sentences which speak jointly of photons and of observed phenomena of light. Such sentences are like cantilever