MAGNET THAT STRAIGHT ENS LIGHT
A magnet that keeps a cord of light straight is one of the interesting and practical marvels recently produced by a famous electrical firm. This company's discharge tubes, which are well known in* the light-
1 ing of many of our streets, have been adapted to floodlighting -and large numbers have been installed for spectacular coloured lighting effects. These discharge lamps have no filament, but consist of a sausagelike glass tube containing two electrodes immersed in mercury vapour. The electric current passes from one electrode to other, forming a cord of intensely luminous vapour about the thickness and length of an ordinary pencil, and giving a light of nearly 2500 candle-power. When such a lamp was used in a horizontal position it was found that the cord of light bent itself upwards at the risk of damaging the glass, but the scientists at the Wembley laboratories found that if a suitable electro magnet were placed beneath the lamp, the cord of light could be held centrally within the glass tube. In floodlighting .projectors, this magnet is arranged to swing so that, whatever the position of the projector, the magnet is always directly beneath the lamp.
Permanent link to this item
https://paperspast.natlib.govt.nz/newspapers/TAWC19360911.2.60
Bibliographic details
Te Awamutu Courier, Volume 53, Issue 3807, 11 September 1936, Page 9
Word Count
200MAGNET THAT STRAIGHT ENS LIGHT Te Awamutu Courier, Volume 53, Issue 3807, 11 September 1936, Page 9
Using This Item
NZME is the copyright owner for the Te Awamutu Courier. You can reproduce in-copyright material from this newspaper for non-commercial use under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International licence (CC BY-NC-SA 4.0). This newspaper is not available for commercial use without the consent of NZME. For advice on reproduction of out-of-copyright material from this newspaper, please refer to the Copyright guide.
Log in