l1=3.25 and l2=0.75
Those are the answers! Thanks!
BUUUT, how did you know l1+l2=4m
how do i know the wave have destructive interference
and how was I suppose to know I was looking for l1 and l2
I feel so silly right now, because this problem is the 1st problem of my physics problem set(and easiest), and I've done all the rest of the harder problems, but I can't get this simple problem!
Homework Statement
two in phase sources of waves are separated by a distance of 4.00m these...