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AP 507 PHYSICS OF RADIATION INTERACTIONS IN AGRICULTURE                                                                 (3L+0P) III

Objective
  To educate students about different types of radiations, their principles, characteristics, interaction with matter and use in agricultural studies.

Theory

UNIT I
  Electromagnetic spectrum, energy sources and their characteristics, spectral distribution of radiant energy, energy content in different radiations, radiation units, flux, intensity, emittance, inter conversion of radiometric units.

UNIT II
  Radiation principles, resolution, geometry considerations, solid angle concept, inter conversion of photometric units, interaction of  radiation with matter, scattering, reflection, transmission, absorption, diffuse and specular radiations, lambertian surface, different types of scattering.

UNIT III
  Photosynthetically active radiation, Einstein, mole, photon units and their inter conversion, colour designations, conversion of optical to thermal and other forms of energy.

UNIT IV
  Thermal radiations, blackbody radiation, Kirchoff ’s law, Stefan-Boltzman law, Planck’s law, Wein’s displacement law, Rayleigh-Jean’s law, thermal properties of interacting materials, thermal emissivity, thermal inertia.

UNIT V
  Microwave radiations, dielectric constant, microwave energy dissipation in interacting materials, isotropic and non-isotropic mediums, microwave transmission, reflection, polarization, microwave and radio wave heating, ionizing and non-ionizing radiations, applications in agriculture and biology.

UNIT VI
  Energy balance of land surfaces, energy budget of leaf, energy budget of crop canopy, radiation interception, energy flow in ecosystems.

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