In diffraction from a single slit, the angular width of the central maxima does not depend upon which of the following?

λ of the light used. width of the slit distance of the slits from the screen D ratio of λ and the slit width.

distance of the slits from the screen D

Use : Angular width of central maxima : 2θ = 2λ/w w is the width of the the slit.