Not forgotten, Billy ... there's just too many, eh?
Microwave Therapy (MWT): 2.45 GHz typical (very close, you will notice, to Wi-Fi at 2.4 GHz)!
I have certain theories about the Frequency Spectrum in general, along the lines of:- if a guy has a good grasp of all that, then he's well on the road to understanding biomed as a whole.
Colours (nanometres). Ultrasound. X-Rays. Fundamentals. Physiological signals (frequency, voltage level
etc.) ... and all good stuff like that.
