meter v rhythm

[tectak]

in poetry is there any difference between meter and rhythm.

i sort of get the impression that rhythm is in the amount of times a foot [stressed or unstressed] is used in iambic pentameter; pentameter is the rhythm, iambic the meter.

is this right or wrong?

If there is Music in poetry then different meter creates different rhythm. This may seem blatantly obvious but meter is a mathematically derived parameter which can create emotional "effects".
For example, di dum di dum di dum di dum is a "meter" which gallops and works in fast moving, rollicking rhymes. On the other hand dum di dah dah, dum di dah dah, dum di dah dah, dum di dum. is more suited to slow.and dirge-like "heavy" verse.
Some meter is skitterish and relies more upon pattern over time rather than "blocks". di di di di, di di di di, di di di di, di di dum..
There are some complex examples of meter which "hit" you without warning because they suggest a subtle and yet strangely familiar "rhythm". di dah di dah di dah dah,...dah dah di dah di dah dah. and we are back to.music... the opening bars of Sound of Silence.
So meter is the mathematics, the describable concept which is fixed by fact...but rhythm is the emotional response to meter.
Purists will be quick to point out that rhythm can be varied by speed of delivery and this is undeniably true...yet it is strange, is it not, that we aspirinants struggle to make words "fit" meter, at any speed, yet we seem to introduce emotion by the controlled application of rhythm.
So there.
Best,
tectak