Word: focal
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...photographing the eclipse any camera can be used, but the longer the focal length the larger the sun's image will be. The camera also must be protected from the sun--use small lens openings and neutral-density filters throughout the partial phases...
...your editorial of April 22, 1963, "Mr. Kennedy in Boston", after commenting on the President's speech on behalf of education at the Boston College Centennial, you that the President's stress on the "focal role the University" means "little more than the abduction her professors, and the purchase of their research time loyalties. It remains to be seen whether any significance should be attached to his expression of equal concern for the studies that cannot directly help run the government. In the recent past, Mr. Kennedy's sympathies in education have gone unaffected, largely for lack his own support...
Domestically, the "knowledge industry" now accounts for 29 per cent of gross national product according to a recent study, Kerr said. It could become, in the next half-century, "the focal point for national growth," as universities continue to become centers of the "ideopolis"--complexes that include not only school buildings but industry, research institutes, cultural centers...
...learning to talk the language of progress and peace across the barriers of sect and creed. It seems reasonable to hope that a similar process may be taking place across the quite different barrier of the higher learning.... The new realities of our day have combined to intensify the focal role of the university.... Accelerating change is the one universal human prospect. The universities must help...
...placed precisely at the focus of a 5-in. reflecting telescope that concentrated its infra-red light into a tight bundle. On the roof of the lab, the researchers set up their receiver-the reflector of a 5-ft. war-surplus searchlight with a sensitive photocell at its focal point...