c
\(\lambda \,\, = \,\,\,6000\,\,\mathop A\limits^ \circ  \,\,\, = \,\,6\,\, \times \,\,{10^{ - 7}}m\,\,\,\,\,\,d\,\, = \,\,0.1\,\,\,cm\,\,\)

\( = \,\,1\,\, \times \,\,\,{10^{ - 3}}\,\,m,\,\,D\,\, = \,\,1\,m,\,\,\,\,n\,\, = \,\,10\)

બે ન્યૂનતમ વચ્ચે નું અંતર = શલાકા ની પહોળાઈ  \(\beta \)

\(\beta \,\, = \,\,\,\frac{{\lambda D}}{d}\,\,\, = \,\,\,\,\frac{{6\,\, \times \,\,{{10}^{ - 7}} \times \,\,1}}{{1\,\, \times \,\,{{10}^{ - 3}}}}\,\, = \,\,6\,\, \times \,\,{10^{ - 4}}\,\,m\,\, = \,\,0.6\,\,mm\)