Light waves are sent through an opening. The diagrams illustrate two possible results. Which row gives the correct answer?
- Athe effect on the wave as it passes through the gap: speed changes; diagram after it has passed through the gap: diagram 1 is correct
- Bthe effect on the wave as it passes through the gap: speed changes; diagram after it has passed through the gap: diagram 2 is correct
- Cthe effect on the wave as it passes through the gap: speed remains constant; diagram after it has passed through the gap: diagram 1 is correct
- Dthe effect on the wave as it passes through the gap: speed remains constant; diagram after it has passed through the gap: diagram 2 is correct