**Q1: **

Which of the following conditions results in the largest diffraction angle when a wave passes through a gap?

- AThe gap’s width is equal to the speed of the wave multiplied by the periodic time of the wave.
- BThe gap’s width is equal to the amplitude of the wave.
- CThe gap’s width is equal to the speed of the wave multiplied by the amplitude of the wave.
- DThe gap’s width is equal to the wavelength of the wave.
- EThe gap’s width is equal to the speed of the wave multiplied by the frequency of the wave.

**Q2: **

Which of the following is a correct definition of diffraction?

- ADiffraction is the change in wavelength of a wave that passes through an aperture.
- BDiffraction is the change in direction of a wave that passes from one medium into another with a different density.
- CDiffraction is the change in direction of a wave that passes close to an object and changes its direction by an angle greater than 90 degrees.
- DDiffraction is the change in direction of a wave that passes close to an object and changes its direction by an angle smaller than 90 degrees.
- EDiffraction is the change in speed of a wave that passes through an aperture.