Single and double slit diffraction formulae

[EdTheHead]

Is the formula for single slit diffraction $$Dsin\theta = m\lambda$$ identical to the double slit diffraction besides m being minima rather than maxima? More specifically will m + 1/2 tell me the angles between maxima?

 

[Doc Al]

Is the formula for single slit diffraction $$Dsin\theta = m\lambda$$ identical to the double slit diffraction besides m being minima rather than maxima?

Yes, where D is the distance between the slits instead of the slit width.

More specifically will m + 1/2 tell me the angles between maxima?

No, except approximately. Finding the maxima for single slit diffraction is more complicated.