Abstract
Initial consideration of quantized vortices led to a detailed study of light scattering in liquid helium with very high resolution classical instruments and observation of novel spectra. The need for yet higher resolution led in turn to study of time-domain spectroscopy. Precise control of optical wave front and coherence is required in these techniques, and this initiated the discovery of optical vortices with multistart helical cophasal surfaces as demonstrated by unusual interference fringes. Finally the application of such laser scattering techniques has revealed the presence of descending ring vortices in thunderstorm microbursts and has been used to study the powerful wake vortices generated by aircraft.
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