Final answer:
The diffraction pattern will become wider if a hole that a red laser pointer shines through is made smaller and narrower if made larger. Green light would produce a narrower pattern due to its shorter wavelength. The spacing of the bands in the pattern increases as the slit width increases.
Step-by-step explanation:
When considering how the pattern of diffraction changes as the size of a hole or a slit changes, one must understand that diffraction is highly dependent on the size of the aperture relative to the wavelength of the light passing through it. If a red laser pointer's light, which is typically around 650nm in wavelength, was shining through a hole and that hole was made smaller, the diffraction pattern would become wider. Conversely, making the hole larger would result in a narrower diffraction pattern. Regarding different colors of light, such as green light which has a shorter wavelength (typically around 532nm), the diffraction pattern would be narrower than that of red light when passing through the same hole size because the degree of diffraction is inversely proportional to the light's wavelength.
As for the spacing of bands produced by diffraction patterns, when the width of a slit is increased, the width of the spaces between the bands will also increase. The pattern itself is dictated by both slit width and wavelength; hence changing the wavelength or the size of the aperture will alter the diffraction pattern observed.