âOperational definitions are essential to research because they permit investigators to measure abstract concepts and constructs and permit scientists to permit move from the level of constructs and theory to the level of observationâ (Ary 1985).
Maximum duration of insolation occurs on the summer solstice (June 21). Duration of insolation is the hours of sunlight we receive on that given day in a given area. The summe â¦ r solstice, or June 21, is when we have the most amount of sunlight on a day in the whole entire year so therefore; maximum duration of insolation is greatest on that day. 1 person found this useful. Answered.
Determine insolation. 1. Use a solar insolation table to determine the insolation, the average number of hours per day that the sun produces peak sunlight (or an accumulation of all sunlight equivalent to that amount of peak sunlight), for your area. 2. Find the nearest city to you on the table and write down the average daily figure.