TABLE OF CONTENTS 



Introduction 



Absorption Processes at Very High Frequencies 1 



1 Q 



Pair Production and Corapton Effect ( > 10 cycles/sec) 1 



The Photoelectric Effect ( > 3x10^^ cps) 3 



Absorption Processes in the Visible Region 4 



Scattering of Light by Na and Cl ions (Thomson scattering) 4 



Scattering by Small Particles 4 



Molecular Scattering 6 



Absorption and Dispersion for Ultra-Violet and Infrared Frequencies 

 Absorption at Longer Wavelengths (D. C. to Microwave) 



Experimental Results 10 



Discussion 13 



