# Find TM waves mode in a rectangular waveguide

1. Jan 7, 2015

### baby_1

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

Hello
As you see my solution I found TM(5 , 2.5) that is incorrect because n should be integer not float number.In Addition when I check book solution I found TM mode is TM(2,1)
what is my mistake?

2. Jan 10, 2015

### gabbagabbahey

Hi baby_1,

Have you checked the errata for the edition of the book you are using. Seems to me there is a typo in their problem statement (which doesn't even tell you what units to use for the coordinates $x$ and $y$. What textbook is this from?

Cheers,
Gabba