A telescope of aperture 3x10^-2 m diameter is focused on a window at 80 m distance fitted with a wire mesh of spacing 2x10^-3 m.
​Given lamda= 5.5x10^-7 m, which is true:
​a) Yes possible with same aperture size
b) no, not possible
​c) possible also when aperture half of present diameter 
​d) Data not sufficient.

Dear student
using formula θ=1.22λa×spacing=1.22×5.5×10-73×10-2×80 =178.93×10-5which is too smaller as compared to resulation given in question hence it is not possible.Regards

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