The diagram shows wavefronts on the surface of water, seen from above. Which row gives the correct description for the wavefronts travelling from region 1 to region 2?
- Adiffraction; the speeds of the wavefronts in regions 1 and 2 are different
- Bdiffraction; the speeds of the wavefronts in regions 1 and 2 are the same
- Crefraction; the speeds of the wavefronts in regions 1 and 2 are different
- Drefraction; the speeds of the wavefronts in regions 1 and 2 are the same