6 ms·

I think it means that quantum effects become a problem when you get to around that size.

• aj7 5y ago
  No. Actually it’s the extreme difficulty of making coherent light at short wavelengths and, if you succeed, material absorption. If you could overcome these, the quantum effects “help” you, because you have succeeded in making and guiding light at a smaller wavelength, hence miniaturization, which is everything.