β Scribed by B. J. Mason; R. Ramanadham
No coin nor oath required. For personal study only.
An instrument which gives a continuous, automatic record of the size distribution of raindrops at ground level is described. The light scattered by the drops in falling through an optically defined area of a light beam is focused on to a photomultiplier cell and the resulting voltage pulses are sorted electronically into eight different size groups. The spectrometer is used to study the variation of the dropβsize spectrum with time and with the rate of rainfall. Calibration curves and some specimen results are presented.
π SIMILAR VOLUMES
## Optical filters Patent 1 206 260 granted to A. P. Predrick. (Oct. 23, 1969) A wavelength selective light screen permitting the passage of blue-violet light, but not red light, comprises a thin perforated sheet sandwiched between strengthening sheets. Beam splitter Patent 1 206 461 granted to E
## Abstract A simple form of raindrop spectrograph is described. It is capable of giving a continuous record of the changes in the distribution of drop sizes which occur during a fall of rain. Examples are given of the spectra obtained during a variety of rain situations ranging from continuous ra
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