Answer:
Here's what I get
Explanation:
When two waves meet, they interfere with each other.
1. Constructive interference
If the crests of the waves happen to line up, as in Fig. 1, the amplitudes add up.
The crests become twice as high. The troughs also line up, so they become twice as deep.
We call this constructive interference.
2. Destructive interference
If the trough of one wave meets the crest of another, as in Fig. 2, the opposite happens.
The trough of one wave subtracts from the crest of the other, so the two waves cancel.
We call this effect destructive interference.
