Answer Happy

Lab 4: Two-source Interference and Beats Post Lab: The geometry of two-source interference In this post la activity you will explore in more details on how to semify whether on a somewhere in front of the speakers is an area of constructie interference of destructive interference A. Consider the diagram below showing the two sources and a point labeled in front of them. We want to figure out if the waves interfere constructively or destructivdy (or something in between) at P. Source A Source The two sources A and B are emitting wave crests at the very instant this picture was taken. You can also see the previous three wave crests in red). Of course, the waves really spread out in all directions as you saw in the simulation, but we're only interested in the part of the wave that travels towards the point P. 1. Add further equally spaced wave crests along cach line. 2. Now add the position of wave troughis along each line, using a different color 3. Is point on a wave crest or in a wave trough with regards to the sound wave emitted by A? a 4. Is point P on a wave crest or in a wave trough with regards to the sound wave emitted by B? 3. Is the point P therefore a point of constructive or destructive interference. or somewhere in between? 6. How would your picture change if we "Waited" half a wave period? Would your answer to part 5 above still hold?