A Curious Optical Phenomenon.
The recent observations of Professor Tyndall are interesting in the extreme. On opening the door of his cottage in the Alps on the evening of the 27th September last, ho observed hia shadow, thrown by a small lamp on the wall behind, projected on the fog outside, and round his head a luminous circle or halo, without color, which proved to be an artificial rainbow. This he succeeded in reproducing by means of a copper boiler, from which steam was let out into the cold air to form a fog, and the light of the lamp behind the head to replace the sun. With an electric light the circular bow was very distinct and showed signs of color, its outer circumference being red and its inner blue. Moreover, the corresponding secondary bow was seen beyond it, with its colors reversed. To those who may wish to make the experiment in an inexpensive way, Dr. Tyndall recommends a spray of spirits of turpentine and petroleum.
Permanent link to this item
Hononga pūmau ki tēnei tūemi
https://paperspast.natlib.govt.nz/newspapers/WT18840913.2.51.3
Bibliographic details
Ngā taipitopito pukapuka
Waikato Times, Volume XXIII, Issue 1902, 13 September 1884, Page 6
Word count
Tapeke kupu
168A Curious Optical Phenomenon. Waikato Times, Volume XXIII, Issue 1902, 13 September 1884, Page 6
Using this item
Te whakamahi i tēnei tūemi
No known copyright (New Zealand)
To the best of the National Library of New Zealand’s knowledge, under New Zealand law, there is no copyright in this item in New Zealand.
You can copy this item, share it, and post it on a blog or website. It can be modified, remixed and built upon. It can be used commercially. If reproducing this item, it is helpful to include the source.
For further information please refer to the Copyright guide.
Log in