With $w=1.5\,\mathrm{\mu m}$ the same principal maxima sit inside a narrower envelope, whose first zeros are at \b[$s=\pm10/3$]. The third order is now close to a zero and is strongly suppressed, whereas the central peak is taller. The first exact missing nonzero integer orders are $m=\pm10$; $m=3$ is suppressed rather than identically missing.


Solution

Past exam of the physics A course of the University of Cambridge / 2011 / Paper 1 / Section B / B8 / b / Solution

 Solution (source code)