TIME AND INTENSITY IN PHOTOSENSORY STIMULATION

In its photosensory effect, the action of light depends on two variables,—intensity and time. If the intensity alone is varied, the photochemical effect is proportional to the logarithm of the intensity. If the time alone is varied, the effect is proportional to the time. Experiments here reported s...

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Detalles Bibliográficos
Autor principal: Hecht, Selig
Formato: Texto
Lenguaje:English
Publicado: The Rockefeller University Press 1921
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2140446/
https://www.ncbi.nlm.nih.gov/pubmed/19871872
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author Hecht, Selig
author_facet Hecht, Selig
author_sort Hecht, Selig
collection PubMed
description In its photosensory effect, the action of light depends on two variables,—intensity and time. If the intensity alone is varied, the photochemical effect is proportional to the logarithm of the intensity. If the time alone is varied, the effect is proportional to the time. Experiments here reported show that when both the intensity and the time are varied, the photochemical effect is equal to the product of their separate activities: E = kt log I. These results furnish the means of expressing directly the relation between the intensity of illumination and the reaction time of Mya.
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spelling pubmed-21404462008-04-23 TIME AND INTENSITY IN PHOTOSENSORY STIMULATION Hecht, Selig J Gen Physiol Article In its photosensory effect, the action of light depends on two variables,—intensity and time. If the intensity alone is varied, the photochemical effect is proportional to the logarithm of the intensity. If the time alone is varied, the effect is proportional to the time. Experiments here reported show that when both the intensity and the time are varied, the photochemical effect is equal to the product of their separate activities: E = kt log I. These results furnish the means of expressing directly the relation between the intensity of illumination and the reaction time of Mya. The Rockefeller University Press 1921-01-20 /pmc/articles/PMC2140446/ /pubmed/19871872 Text en Copyright © Copyright, 1921, by The Rockefeller Institute for Medical Research This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/).
spellingShingle Article
Hecht, Selig
TIME AND INTENSITY IN PHOTOSENSORY STIMULATION
title TIME AND INTENSITY IN PHOTOSENSORY STIMULATION
title_full TIME AND INTENSITY IN PHOTOSENSORY STIMULATION
title_fullStr TIME AND INTENSITY IN PHOTOSENSORY STIMULATION
title_full_unstemmed TIME AND INTENSITY IN PHOTOSENSORY STIMULATION
title_short TIME AND INTENSITY IN PHOTOSENSORY STIMULATION
title_sort time and intensity in photosensory stimulation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2140446/
https://www.ncbi.nlm.nih.gov/pubmed/19871872
work_keys_str_mv AT hechtselig timeandintensityinphotosensorystimulation

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