English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In the “Philosophical Magazine” for September, 1883, we showed that certain relations existed between potential, current, watts (volt-ampères), and radiation in incandescence lamps, and that ifp = the potential,c = current,w = watts,R = radiation, anda andb were constants, then (i)c =ap +bp 3/2 , and consequently that (ii)w =p 2 (a +bp ½ ) ; further we showed that after the carbon filaments attained a certain heat, the radiation varied directly as the energy. (iii) R∝ (w —m ) wherem is a constant. We may incidentally mention that this relationship appears to hold good in a properly exhausted lamp, be the filament of carbon or of platinum, or presumably of other metals. In this case the sign in the left hand members of equations (i) and (ii) is changed. On laying down graphically the curve obtained by using the watts as the abscissæ and the radiation as ordinates, it was at once evident that the straight part is an asymptote to a curve having its origin at 0. It might, therefore, be presumed that each individual ray should increase in intensity in somewhat the same manner when the energy in the filament was increased,i. e. , in some simple curve which would have an asymptote.

XIV. The relation between electric energy and radiation in the spectrum of incandescence lamps