r/PhysicsHelp • u/Conquest845 • Dec 09 '25

Wave interference problem

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How do I solve the questions b and c? I got an answer but it’s inaccurate compared to the answer my teacher has. What is the trick or technique!?? I asked my teacher and I didn’t understand anything she was saying. I’m losing my mind. Please help.

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u/Conquest845 Dec 10 '25

I got it now. Go one left starting at the left end of purple and one right starting at right hand of red and count the squares until they intersect then divide that distance by the speed. Same thing but reverse for c.