Diffraction and Wave Interference (1 Viewer)

[serge]

Hey people

HSC online says that constructive interference happends when two crests meet
and destructive happens when two troughs meet...

but doesnt destructive mean a trough and a crest meet, so 0 is leftover?
(i was taught that constructive is two troughs meeting or two crests meeting)

how does it really work?

thanks

 

[wanton-wonton]

You're right.

The HSC online thing is wrong.