I'm the same person Mario59, who posted before... sorry for the different avatar....
After viewing neufer's video (
) I've heard & recognised that all those "burps" are the very same "burp" record... (well almost most of them)
If I could have a diagram of the burp sound & it's spectrogram, I could easily see that it's the same record, not caring about the signal amplitude (which depends from the source distance) and it's spectrum (which depends from the relative velocity to the observer, ging on with the similarity...)
So there's a clear "parallel arguments" in the short cartoon movie, with the quasar's 4 images which are claimed to be the same quasar.
I'm sure that the 4 images are from the same source, but what "lock me out" is the fact that these are *FOUR* images... and couldn't clearly understand why...
Ok, the images have different path length going around that galaxy from the quasar source.
But taking into account the distance we, the observers have from that galaxy and the quasar source, we can imagine an EXTREMELY ELONGATED isosceles-like triangle, which base is the galaxy diameter (well almost) and having a vertex in the quasar source.
The two sides of this imaginary triangle are the path the light follows to get around the galaxy.
Ok, so we have, according to wikipedia, an isosceles triangle with (let's say) 100.000 ly base (average galaxy diameter) and around 8 BILLION ly in height... also a child can realize that the two long sides of the imaginary triangle are WAY BIGGER than it's base in a ratio of 1 to 80000....
Consequently it's hard to say that the quasar image follows two substantially different path lengths.
One could say that even the non-perfect alignment of the quasar-galaxy-earth, the image appearing around the galaxy should be the same.... so we should have an Einstein ring, instead of 4 dots....
Also the "flickering" should be essentially in sync with respect of each image... This is why I written "overlap" in my previous post....
and here the mistery arose: why we have 4 images instead of an (also maybe distorted) arc???
I'm the same person Mario59, who posted before... sorry for the different avatar....
After viewing neufer's video ( :lol2: ) I've heard & recognised that all those "burps" are the very same "burp" record... (well almost most of them)
If I could have a diagram of the burp sound & it's spectrogram, I could easily see that it's the same record, not caring about the signal amplitude (which depends from the source distance) and it's spectrum (which depends from the relative velocity to the observer, ging on with the similarity...)
So there's a clear "parallel arguments" in the short cartoon movie, with the quasar's 4 images which are claimed to be the same quasar.
I'm sure that the 4 images are from the same source, but what "lock me out" is the fact that these are *FOUR* images... and couldn't clearly understand why...
Ok, the images have different path length going around that galaxy from the quasar source.
But taking into account the distance we, the observers have from that galaxy and the quasar source, we can imagine an EXTREMELY ELONGATED isosceles-like triangle, which base is the galaxy diameter (well almost) and having a vertex in the quasar source.
The two sides of this imaginary triangle are the path the light follows to get around the galaxy.
Ok, so we have, according to wikipedia, an isosceles triangle with (let's say) 100.000 ly base (average galaxy diameter) and around 8 BILLION ly in height... also a child can realize that the two long sides of the imaginary triangle are WAY BIGGER than it's base in a ratio of 1 to 80000....
Consequently it's hard to say that the quasar image follows two substantially different path lengths.
One could say that even the non-perfect alignment of the quasar-galaxy-earth, the image appearing around the galaxy should be the same.... so we should have an Einstein ring, instead of 4 dots....
Also the "flickering" should be essentially in sync with respect of each image... This is why I written "overlap" in my previous post....
and here the mistery arose: why we have 4 images instead of an (also maybe distorted) arc???