Answer:
Constructive interference: destructive interference
Explanation:
Constructive interference occurs when waves are in phase or sync with one another and will lead to brighter and bolder results while destructive interference occurs when waves are out of phase with one another.
In this scenario, light passing through two slits creates a pattern of bright and dark fringes on a screen. The bright fringes result from constructive interference ; the dark fringes result from destructive interference.