Department of Electrical and Computer Engineering

University of Manitoba



Waldemar H. Lehn

Professor Emeritus


Tel.:            204 474 8102

Fax:            204 261 4639




Research Interests:

Atmospheric refraction of light, in particular:

superior and inferior mirages;

calculation of images by ray tracing;

modeling atmospheres that produce specific observed images;

history of atmospheric refraction;

explanation of Old Norse observations of the merman and mermaid;

the discovery of Greenland.


Publications available for download, on condition that

the download is for personal use only: Papers for Download


Some images of mirages are also available for

personal study: Mirages at Tuktoyaktuk