The double convex lens/double convex mirror is symmetrical across both its horizontal and vertical axis. Each of the lens\'s two faces can be thought of as originally being part of a sphere. The fact that a double convex lens/mirror is thicker across its middle is an indicator ...
The double convex lens/double convex mirror is symmetrical across both its horizontal and vertical axis. Each of the lens\'s two faces can be thought of as originally being part of a sphere. The fact that a double convex lens/mirror is thicker across its middle is an indicator ...