[Fester Chugabrew]

Which of a ruler, a microwave, a block of cheese, and intelligence are you lacking?

None. But what I lack is physical confirmation of the length of one microwave, which, as far as I know, is outside the frequency for visible light. But then, my issue is not with any scientific declaration that the speed of light can be determined both in quantum and non-quantum terms, nor with the results that have been reported to me. I'm only saying that science is far more ignorant than it presents itself to be, but is afraid to admit it, especially where renditions of unrecorded, unobserved history is concerned. The nature of light is not a settled question. Or has all reasearch in this field come to a halt while science moved on to bigger and better things?

[RadioAstronomer]

None. But what I lack is physical confirmation of the length of one microwave

Ever hear of a magnatron or waveguide?

[dread78645]

But what I lack is physical confirmation of the length of one microwave, which, as far as I know, is outside the frequency for visible light.

Uhm that's what you're supposed to use the ruler for.

lf = c

l - the wavelength you measured.
f - the frequency of the oven's magnetron
c - the speed of light

If the oven operates at (the standard) 2.45 Ghz you'll see melted/unmelted nodes about every 12cm.