# Gravitational lens and gravitational waves question

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Can anyone answer that question for that is where we will see the change in the chirp waveform if it is going to show a Shapiro time delay by delaying the onset or making the onset earlier of the maximum or the minimum part of the waveform.

There is no separate Shapiro delay. The changes in space-time geometry that would cause a delay to passing light waves are [part of] what generates gravitational waves.

Since space is 3D if we were to squeeze it in one direction would it expand in the other two? Are they 3D ripples in spacetime or just 2D as drawn in the Wikipedia animations?

They are 4D waves (see the other thread about using an array of clocks to detect gravitational waves). They cause alternate compression and expansion in the x, y and (I think) t axes, and no effect (I think) in the z axis.

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Polarization can be used to determine orientation. Here

http://relativity.livingreviews.org/open?pubNo=lrr-2009-2&page=articlesu27.html

That was good but it didn't go far enough to explain the position of the bodies to the phase of the wave. But it got very close. That has really helped and that was how I had imagined it

"circular polarization along the angular momentum axis

linear polarization in its equatorial plane (orbital plane).

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Polarization measurements have an important application in astronomy. The polarization of the waves contains orientation information. For example, a binary system emits purely circular polarization along the angular momentum axis, but purely linear polarization in its equatorial plane. By measuring the polarization of waves from a binary (or from a spinning neutron star) one can determine the orientation and inclination of its spin axis.

.The arrow of the polarization (maximum) is like orthogonal with the distance vector between the two masses (BBH). It is harder to relate to linear polarization. (Do you agree with that?)

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That's probably because your missing the connection between the amplitude of the signal and the angular momentum.

Ask yourself this question "Which BH has more redshift/blueshift?

Which one is moving faster than the other?

The signal itself is emitted by the shared spacetime between BOTH BH's

Why do you think the amplitude is calculated via loss of angular momentum of the system.

See section 3.5 of the above link.

http://relativity.livingreviews.org/open?pubNo=lrr-2009-2&page=articlesu27.html

Here notice the seemingly random movement of spacetime outside the Einstein ring.

http://apod.nasa.gov/apod/ap160212.html

Here is a good example of the sinusoidal distortions.

http://www.outerspacecentral.com/relativity_page.html

these are due to the Quadrupole polarization strains

Edited by Mordred

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