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Closer Than They Appear

"Objects in mirror are closer than they appear"? Well, Duh! — that's just the Triangle Inequality, assuming flat spacetime and flat mirrors and no refractive media.

Yep, Mr. Picky re-emerged yesterday morning to quibble again, during my walk to the local Metro station at 0530 ...

(pedestrian explanation: the Triangle Inequality says that the sum of two legs of a triangle — like the two legs of light's path between an object, a mirror, and the observer — is greater than the third leg, the distance directly between an object and the observer; the usual warning etched onto a car's curved side-mirror is therefore redundant, technically) - ^z - 2011-09-30