Question

Which of the following is the best definition of constructive interference?
the subtraction of one wave from another
the addition of one wave to another
the blocking of one wave by another
the cancelling of one wave by another

Answer 1

So constructive interference, what does that sound like on its own? Well if it's constructive, that means building right? So it's probably some kind of interference that adds on itself.

Interference is when two things interfere or interact, right? So this gives us two things that interact with each other and add on each other. That's really what constructive interference is.

It's when one wave and another wave come together and make an even bigger wave, like this: