Cecil Moore wrote:

Jim Kelley wrote:
What do you think the Bird actually measuring?

It is phasor-adding/subtracting a voltage proportional to the
RF voltage to/from a voltage proportional to the RF current.

Voltage, correct. What other physical parameter(s) of the EM wave
besides voltage and/or current could an in-line meter directly measure?
Why?

Instead of posing and then solving a different problem, why not just
answer the question I asked?

I did.

Actually, you didn't. It's a multiple choice question.

How much energy passes a point on that open transmission line in one
second? The choices again are 100 Joules, 200 Joules, or zero Joules.
Please indicate the correct answer from the list of choices.

73, Jim AC6XG