In diffraction from a single slit, the angular width of the central maxima does not depend on 

a) 
of light used 
b) 
Width of slit 
c) 
Distance of slits from screen 
d) 
Ratio of and slit width 
In diffraction from a single slit, the angular width of the central maxima does not depend on 

a) 
of light used 
b) 
Width of slit 
c) 
Distance of slits from screen 
d) 
Ratio of and slit width 
(c)
For a slit of width light of wavelength when light falls on the slit, the diffraction patterns so obtained as
The first diffraction minimum occurs at the angles given by
From the equation, it is clear that width of the central diffraction maximum is inversely proportional to the width of the slit. On increasing the width size , the angle at which the intensity first becomes zero decreases, resulting in a narrower central band and if the slit width is made smaller, the angle increases, giving a wider central band.