Reflectance and Transmittance of Light by Leaves | Zendy

Joseph T. Woolley | Zendy

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Reflectance and Transmittance of Light by Leaves

Author(s) -

Joseph T. Woolley

Publication year - 1971

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.47.5.656

Subject(s) - transmittance , wavelength , reflectivity , materials science , optics , polarization (electrochemistry) , interference (communication) , refractive index , chemistry , optoelectronics , physics , channel (broadcasting) , electrical engineering , engineering

Spectrophotometric transmittance and reflectance curves were recorded for wavelengths from 0.45 (in some cases 0.34) to 2.7 micrometers for faces and backs of leaves and for stacked leaves of several plant species. Measurements were made at different angles of illumination. Leaf spectrophotometric curves were compared with curves for leaf extracts, potato tuber tissue, glass beads in water, and frozen leaves to demonstrate the physical bases for the leaf curves. Leaves were infiltrated with liquids of different refractive indices for further comparison of spectrophotometric curves. Goniophotometric reflectance curves were recorded, giving visible reflectance and degree of polarization as functions of viewing angle for two different angles of illumination.No retroreflection was observed, and no phenomena were observed which could be attributed to interference because of similarity between leaf structural sizes and wavelengths used.

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