The number of equal thickness interference fringes on the discussion
Zhang Xiao-hon · Journal of Langfang Teachers College · 2011
In college physics teaching,when we calculate the number of fringes formed by equal thickness interference,we often adopt the method of calculating the number of intervals of two adjacent bright(dark) lines,then the number of intervals of lines is equal to the number of fringes.After many years of teaching physics,I think that the above method of calculating the number of bright(dark) lines is not very clear in physical meaning,especially it is difficult for students to master this method.This paper presents the method of calculation of bright,dark fringes by strengthening and weakening the conditions,This method is clear and it's more easily for students to accept it.