#4. You are given the wavelengths [W, here; see above!!!] for C and D.
The applicable equations are 24.9 and 24.10.
The difficulty in solving this problem is that you don't know 'm' .
To find m, solve the two equations simultaneously
for m, using the W's for C and D interference. Then use m in the appropraiate
equation to find t.
Hint: If you come up with negative values for m, note that for C, you could equally well use 2 nt = [m - 1/2]W
#'s 5 and 6. Look at the figure for #6; this general pattern is applicable to any diffraction question. Use the method of equation 24.4 to relate the displacement on a screen [from center of central max to the minima] in terms of Q.
#5.The diffraction equation 24.11 is for D [minima] only. So for the distance between two maxima [C], find an equivalent separation distance in terms of the extant minima, noting that the C peaks are halfway between the D minima.
#6. Use the plot to figure out displacement;
from that and screen distance determine Q. Then use that in
the diffraction equation to find W. Note that the answer is to be
in microm, NOT nanom!!!!!!