SKEDSOFT

Physics For Engineers - 1

Width of principal maxima The angular separartion between the m'th order principal maxima and the next first minima will follow the following conditions

                 (maxima)

    and     (minima)

The second equation can be written as

                (minima)

for small   

The above two equations, therefore give

                                    or       

This is also the half angular width of central maxima.