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Updated: Jun 16, 2026

A Rapid Laser Probing Method Facilitates the Non-invasive and Contact-free Determination of Leaf Thermal Properties
Published on: January 7, 2017
Optical properties of the leaves of some African crop plants
Abstract:
The fate of radiation incident on the leaves of some African crop plants is examined. Transmission coefficients for photosynthetically active radiation are 0.05-0.10 for mature leaves and 0.09-0.39 for young leaves. Increasing the angle of incidence of radiation results in a rise in reflectivity and a fall in absorptivity. Transmissivity rises to angles of incidence of 60 degrees and then falls sharply. Absorptivity and reflectivity are cubic functions of the angle of incidence of radiation. Consequences of these findings for photosynthesis are discussed.
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