Oops not quarter wl - 4x.
For instance - if the HotCat was operating at around 1050 C which corresponds to about 27 THz (wavelength 10.5 microns) then nickel particles which were about 13-14 microns in diameter would have a quarter wl circumference. Could they possibly rectify that wave, or if not, surely there would be extreme resonance? Since current is not passing through the device itself we do not care about bulk electrical resistance.
