Final answer:
The question requires knowledge of wave optics and the interference pattern caused by diffraction in a double-slit experiment, to estimate the size of the central maximum on a screen.
Step-by-step explanation:
The question concerns the interference pattern produced by a laser light passing through a slide and the characteristics of the central maximum observed on the screen. This is a typical high school physics problem involving the concepts of wave optics, diffraction, and the double-slit experiment.
To estimate the size of the central maximum, we would need to use the double-slit interference equation ∆y = λL / d, where ∆y is the distance between adjacent fringes on the screen, λ is the wavelength of the laser light, L is the distance from the slits to the screen, and d is the distance between the slits. However, since the question does not provide the distance between the slits (d), we cannot calculate an exact size for the central maximum. In general, though, one could expect the central maximum to be the brightest and widest part of the pattern, and it usually spans several orders of fringe on either side.