A reception was held and the science departments were on view. A young lady, entering the physical laboratory and seeing an inverted image of herself in a large concave mirror, naively remarked to her companion: "They have hung that looking glass upside down."


Readable Relativity, Chapter II (p. 12), Harper & Brothers. 1960


A reception was held and the science departments were on view. A young lady, entering the physical laboratory and seeing an inverted image of herself ...

A reception was held and the science departments were on view. A young lady, entering the physical laboratory and seeing an inverted image of herself ...

A reception was held and the science departments were on view. A young lady, entering the physical laboratory and seeing an inverted image of herself ...

A reception was held and the science departments were on view. A young lady, entering the physical laboratory and seeing an inverted image of herself ...