first ight minimum. of the yield. Empirical scaling was used to obtain an early estimate ana ee c. Results — The results are given in Table 2.1. 2.2.6.2 High Speed Photography a. Objectives 1. 2. detonations by 3. weapon design, b. To study case reaction and symmetry of early fireball growth. To determine time interval between primary and secondary observation of Teller light. To make measurements of other parameters of interest in . f Techniques 1. Very high speed streak cameras were used to record the history of the light arising near the bomb in the first few microseconds to give time interval,MMM and very early growth of the fireball. 2. Elaborate experiments were devised to measure DELETED t wo c. Results The results of these experiments are contained in the preliminary shot reports and in the various technical reports made by the groups involved. The time interval measurements were in agreement with those made by other methods. - - 45 - 4/3

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