Math Is Fun Forum

sarabjot_anand

Member

Registered: 2009-12-08

Posts: 7

Physics !!

A standing wave is set up between two points creating waves in phase. The second order anti-node is determined to be 10 cm from one source and 15 cm from the other. The speed of the waves is measured to be 20 m/s. What is the frequency of the waves?

juriguen

Member

Registered: 2009-07-05

Posts: 59

Re: Physics !!

Are you sure about the distances of the antinode to the sources?

I don't know exactly what does 2nd order antinode mean. If it would be the 1st antinode in the 2nd harmonic of the standing wave, the following should be true:

And it doesn't make sense.

If the 2nd order antinode means the 2nd antinode for a certain harmonic [n], then the following holds:

Or

And neither of both makes sense, since [n] should be an integer.

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