Document Type

Article

Publication Date

1-1-1985

Publication Title

American Journal Of Physics

Department

Science, Technology and Society

Abstract

Towards the end of the eighteenth century it was discovered by Marc‐Auguste Pictet of Geneva that cold emanations from a flask of snow could be reflected and focused by mirrors in the same way as the emanations from a heated object. Pictet’s discovery had an invigorating effect on research on radiant heat. We sketch the scientific milieu in which Pictet worked, describe the line of investigation that led him to his discovery, and summarize the theoretical explanations offered by Pictet and his contemporaries for this and related experiments. A simple qualitative explanation in modern terms is offered for the apparent radiation and reflection of cold. Finally, detailed directions are provided for replicating the experiment as a demonstration for the lecture hall.

Volume

53

Issue

8

pp.

737-753

ISSN

0002-9505

Download

Share

COinS