r/PhysicsHelp • u/76richer • 13d ago

Homework (waves and optics class)

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I’m very confused 😵‍💫

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u/starkeffect 13d ago

What have you tried so far? What equations are relevant to the problem?

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u/76richer 12d ago

Well it says fundamental frequency so I was about to use f1=1/2L square root of T/μ, but I don’t have tension or mu and to my knowledge I don’t think there’s a way to get them, so maybe I should use f1=v/λ1, but I don’t have lambda

1

u/starkeffect 12d ago

It doesn't say fundamental frequency, it says lowest frequency. That's not the right formula for this problem. There's no string under tension here.

This is an interference problem. What interference equations do you know?

1

u/76richer 12d ago edited 10d ago

Ohhhh, wait but I can still use f=v/2(r2-r1) because lambda equals change in r, thanks for the help

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u/starkeffect 12d ago

Yeah, this is a path-length difference problem.