AEROSOL-PARTICLE MICROPHOTOGRAPHY AND GLARE-SPOT ABSORPTION-SPECTROSCOPY

The relative intensities of glare spots in the image of an electrodyna mically trapped aerosol droplet are measured experimentally with an ae rosol particle microscope and calculated theoretically. The theoretica l calculations are in good agreement with these experiments and indica te that the intensities of these spots are extremely sensitive to the imaginary part of the refractive index Experimentally, we obtain the m olecular absorption spectrum of an impurity within a droplet by record ing the spectrum of an individual glare spot produced by broadband ill umination.