A student notices waves moving across the water surface. The diagram shows two pieces of wood lying in shallow water of uniform depth. Straight, parallel wavefronts are shown approaching the pieces of wood. The gap between the pieces of wood is $2.0\,\mathrm{cm}$ wide. The wavefronts are $3.0\,\mathrm{cm}$ apart. What will the wavefronts look like after they pass through the gap?
- Asemicircular and $2.0\,\mathrm{cm}$ apart
- Bsemicircular and $3.0\,\mathrm{cm}$ apart
- Cstraight and $2.0\,\mathrm{cm}$ apart
- Dstraight and $3.0\,\mathrm{cm}$ apart