RichD wrote:

On Oct 25, c...@kcwc.com (Curt Welch) wrote:

Here's one that keeps me awake at
night: why do they put mirrors on elevator
ceilings?

Security.

Security can mean safety or measures against criminal activity.
From the hall, an elevator could appear empty, but a criminal
could be in the corner by the door. A mirror could let a
prospective passenger or a passing cop see him.

um, a mirror on the ceiling, interior to the elevator?
What laws of optics operate in your country?

This is cross posted to rec.puzzles.  Can't you solve it? :)
A convex security mirror attached to the ceiling would fit his description.

Clever.
But the mirrors are flat.

--
Rich

The ones I've seen were convex, in corners or the center.  Flat ceiling mirrors would be for security against secretaries who might try to smuggle documents in their low-cut blouses.