Answer: The correct answers are bright band and dark band.
Step-by-step explanation:
Diffracted waves of light interact with other waves and interference occurs.
The constructive interference will occur when the the crest of the one wave overlap with the crest of another wave. In this case, the resultant wave will have greater amplitude.
When the interference is constructive, this is shown as a bright band on the screen.
The destructive interference will occur when the the crest of the one wave overlap with the trough of another wave. There is a cut off of light. In this case, the resultant wave will have less amplitude.
When the interference is destructive, this is as shown as a dark band on the screen.
Therefore, the correct answers are bright band and dark band.