3 ms·
The "ruler" you're using is the other arm, which doesn't change in the same way: one axis stretches while the other compresses.
by nyssos 3y ago
The "ruler" you're using is the other arm, which doesn't change in the same way: one axis stretches while the other compresses.
- NoMoreNicksLeft 3y agoTrue, but with only two arms, I think LIGO is somewhat directional, is it not? Stronger signals from some black holes depending on which way they're oriented relative to the arms. And if there were many different simultaneous signals, some could mask the others. Clearly, we need a 3-armed, space-based LIGO. Or better, a dozen of them.
- _Microft 3y agoThere are two LIGO interferometers in the US [0], Virgo in Italy [1], GEO600 in Germany [2], something in Japan [3] and something being planned out being built in India. There is LISA as space-based project in the works too [4]. [0] https://en.m.wikipedia.org/wiki/LIGO https://en.m.wikipedia.org/wiki/LIGO [1] https://en.m.wikipedia.org/wiki/Virgo_interferometer https://en.m.wikipedia.org/wiki/Virgo_interferometer [2] https://en.m.wikipedia.org/wiki/GEO600 https://en.m.wikipedia.org/wiki/GEO600 [3] https://en.m.wikipedia.org/wiki/KAGRA https://en.m.wikipedia.org/wiki/KAGRA [4] https://en.m.wikipedia.org/wiki/Laser_Interferometer_Space_Antenna https://en.m.wikipedia.org/wiki/Laser_Interferometer_Space_A...