4 ms·
Why is it difficult to measure the phase directly for optical wavelength as opposed to radio? Is it purely because the shift is smaller?
by ambicapter 2y ago
Why is it difficult to measure the phase directly for optical wavelength as opposed to radio? Is it purely because the shift is smaller?
- itishappy 2y agoIt's really fast. Visible frequencies are in the THz to PHz range, while radio frequencies are in the kHz. Modern electronics are fast enough to sample the latter but not the former.
- varjag 2y agoRadio frequencies are in KHz to THz range. There is equipment already operating in sub-THz bands but not yet close to the frequencies of light.