Abstract
London
Royal Society, April 29.
H. H. POOLE and W. R. G. ATKINS: The pene tration into the sea of light of various wave-lengths measured by emission or rectifier photo-electric cells. Further measurements of submarine daylight, using emission cells, gave for the vertical extinction coefficient 20 miles from land, \iv = 0-11 for blue and 0-19 for near ultra-violet. The light travelling upwards was about two per cent of that going down wards. Measurements were made with Weston selenium rectifier cells, corrected for the curvature of the illumination current relation, using a modified form of the Campbell Freeth zero-resistance circuit. Infra-red is eliminated in less than 2 m. Red is reduced to 1 per cent at 10 m. The deeper water, 35-50 m., was clearer than that near the surface ia the English Channel 10 miles from land. Near the shore the difference between red and green is lessened but blue is relatively more heavily absorbed and differs more from green.
Article PDF
Rights and permissions
About this article
Cite this article
Societies and Academies. Nature 139, 812–813 (1937). https://doi.org/10.1038/139812a0
Issue Date:
DOI: https://doi.org/10.1038/139812a0