Analysis of Common Solutions to an Optical Exercise
The problems of calculating the angular distance of diffraction fringes according to grating equation are usually found in cur-rent college physics textbooks.The general solution to this kind of problems is to differentiate the grating equation,and then substitute differential for difference approximately to calculate.Some problems of the method,such as inaccurate processing of individual details,not convenient use of formulas,and not giving the applicable conditions of the method,are pointed out.Through theoretical research and example verification,these problems are analyzed in detail,and on this basis,some suggestions are given to solve these problems.
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