Infra-red Photography Astronomers today are able to photograph stars invisible to the eye, pilots can take aerial photographs through fog and haze, and detectives are able t0 expose forgeries of anything from banknotes {0 Old Masters all by means of modern infra-red photography_ Although infra-red rays are similar to the radiations which we call visible light, they cannoc be seen by the human eye: Nevertheless, Photographic plates can be made sensitive to these rays by treat- ment wich certain dyes: These plates can then be used to photo- graph objects that are invisible_ A boiling kettle, for example, czn be photographed in complete darkness because of the infra-red rays which ic emics. Infra-red rays can also be used to photograph distant landscapes or stars because they can Penetrate the atmospheric haze which scatters normal light: The first crude forerunner of the infra-red photograph was made just over a century ag0 by Sir John Herschel: He exposed to the sun'$ rays a piece of blackened paper, the reverse of which had been moistened with alcohol: But during the decade following che end of the first world war investigations by W J. Pope and W. H Mills and their collaborators at Cambridge contributed greatly cO the systematic study and preparation of infra-red sensitising dyes: ICI IMPERIAL CHEMICAL INDUSTRIES (N.Z:) LTD
Permanent link to this item
Hononga pūmau ki tēnei tūemi
https://paperspast.natlib.govt.nz/periodicals/NZLIST19510601.2.10.1
Bibliographic details
Ngā taipitopito pukapuka
New Zealand Listener, Volume 24, Issue 622, 1 June 1951, Page 4
Word count
Tapeke kupu
218Page 4 Advertisement 1 New Zealand Listener, Volume 24, Issue 622, 1 June 1951, Page 4
Using this item
Te whakamahi i tēnei tūemi
Material in this publication is protected by copyright.
Are Media Limited has granted permission to the National Library of New Zealand Te Puna Mātauranga o Aotearoa to develop and maintain this content online. You can search, browse, print and download for research and personal study only. Permission must be obtained from Are Media Limited for any other use.
Copyright in the work University Entrance by Janet Frame (credited as J.F., 22 March 1946, page 18), is owned by the Janet Frame Literary Trust. The National Library has been granted permission to digitise this article and make it available online as part of this digitised version of the New Zealand Listener. You can search, browse, and print this article for research and personal study only. Permission must be obtained from the Janet Frame Literary Trust for any other use.
Copyright in the Denis Glover serial Hot Water Sailor published in 1959 is owned by Pia Glover. The National Library has been granted permission to digitise this serial and make it available online as part of this digitised version of the Listener. You can search, browse, and print this serial for research and personal study only. Permission must be obtained from Pia Glover for any other use.
Log in