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I have a question relating to waveguides. Fine, but having looked at what TE TM modes are I don't really see how I can find the frequency of the μwave with the information I have.

A waveguide with dimensions a & b (short & long sides respetively) propogates in the TM

What is the frequency of the μwave?

Now, I have as a clue "the possible modes for f can be found from the guide dimension & wavelength λ. Where λ= c/f

Lovely, but what is the relationsip of f & cross section to λ?

Surely this is simple enough NOT to have to go into Maxwell's curl equations!

I just don't have enough information!

Confused, simple!

## Homework Equations

A waveguide with dimensions a & b (short & long sides respetively) propogates in the TM

_{10}mode.What is the frequency of the μwave?

Now, I have as a clue "the possible modes for f can be found from the guide dimension & wavelength λ. Where λ= c/f

Lovely, but what is the relationsip of f & cross section to λ?

## The Attempt at a Solution

Surely this is simple enough NOT to have to go into Maxwell's curl equations!

I just don't have enough information!

Confused, simple!

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