The diagram depicts a section of a diffracted wave pattern. The wavelength and the gap size are altered to create a semicircular diffracted wave pattern. Which row gives the required semicircular diffracted wave pattern?
- Agap in barrier: larger; wavelength: same
- Bgap in barrier: larger; wavelength: smaller
- Cgap in barrier: same; wavelength: larger
- Dgap in barrier: same; wavelength: smaller