A student carries out an experiment to study double-slit interference with light, but the fringes formed on the screen are so close together that they cannot be told apart. Which change would make it easier for the student to distinguish the fringes?
- Adecrease the distance $s$ between the two slits
- Bincrease the width of each slit
- Cmove the screen closer to the light source
- Duse a blue filter instead of a red filter