- #1
Phys12
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The video:
When Astrophysicists detected Quasars, they thought that they could not be more than a few light-days across as they were changing their brightness in just a few days. If we assume that they are light-years long, then the change in brightness from the other side would be observed year later, but we see the entire object's brightness change in just a few days.
However, can't it be the case that the closer end changed its brightness so much that it changed our measurements of the entire object's brightness while the change was still progressing through it at the farther end?
When Astrophysicists detected Quasars, they thought that they could not be more than a few light-days across as they were changing their brightness in just a few days. If we assume that they are light-years long, then the change in brightness from the other side would be observed year later, but we see the entire object's brightness change in just a few days.
However, can't it be the case that the closer end changed its brightness so much that it changed our measurements of the entire object's brightness while the change was still progressing through it at the farther end?