A common misconception about laser interferometric detectors of gravitational waves purports that, because the wavelength of laser light and the length of an interferometer's arm are both stretched by a gravitational wave, no effect should be visible, invoking an analogy with cosmological redshift in an expanding universe. The issue is clarified with the help of a direct calculation.
@article{arxiv.gr-qc/0702079,
title = {A common misconception about LIGO detectors of gravitational waves},
author = {Valerio Faraoni},
journal= {arXiv preprint arXiv:gr-qc/0702079},
year = {2014}
}