After I read many articles about measuring film thickness by interference method.
I tried to calculate flow that papers but I can't
the equation is
d= (y1*y2)/(2*(n1y2-n2y1))
for an easy I approximate n1 =n2
so
d= (y1*y2)/(2*n(y2-y1))
y1 = 350 nm
y2 = 380 nm
n =...