Question

what is happening when the crest of wave a and the crest of wave b line up and double the height of the wave?
destructive interference is occurring.
the wave is breaking.
constructive interference is occurring.
the wave is reflecting.

Explanation:

• Destructive interference: Occurs when a crest and a trough line up, canceling each other out.
• Wave breaking: Happens when a wave becomes too steep and collapses.
• Constructive interference: Occurs when two crests (or two troughs) line up, adding their amplitudes together. In this case, the amplitudes of the two waves' crests add up, doubling the height.
• Wave reflecting: Is when a wave bounces off a surface.

Answer:

Constructive interference is occurring.