In a dim room, a small red-light source shines onto two slits that are $0.75\,\text{mm}$ apart. Several metres beyond the slits, the light reaches a screen and produces a pattern of equally spaced bright fringes. Which change would make the spacing between the bright fringes on the screen smaller?
- AChange the source for one emitting blue light.
- BReduce the distance between the light source and the slits.
- CReduce the distance between the slits to $0.55\,\text{mm}$.
- DReduce the intensity of the light source.