Comments? Opinions?In this paper we set out to measure time dilation in quasar light curves. In order to detect the effects of time dilation, sets of light curves from two monitoring programmes are used to construct Fourier power spectra covering time-scales from 50 d to 28 yr. Data from high- and low-redshift samples are compared to look for the changes expected from time dilation. The main result of the paper is that quasar light curves do not show the effects of time dilation. Several explanations are discussed, including the possibility that time dilation effects are exactly offset by an increase in time-scale of variation associated with black hole growth, or that the variations are caused by microlensing in which case time dilation would not be expected.
Time dilation is a phenomenon in which time appears to pass slower for an observer in a strong gravitational field or in motion at high speeds. Quasars, which are very bright and distant objects in the universe, have been observed to exhibit time dilation due to their strong gravitational fields.
Time dilation can cause time to appear to pass at different rates for different observers. For example, an observer on Earth may perceive time passing faster than an observer near a black hole due to the difference in gravitational fields.
Yes, time dilation has been observed and measured in various experiments, such as the famous Hafele-Keating experiment in which atomic clocks on airplanes were found to run slightly slower than clocks on the ground due to the speed of the planes.
Quasars are believed to be powered by supermassive black holes at their centers. These black holes have immense gravity that can distort the fabric of spacetime and cause time dilation.
No, time dilation is a measurable effect on the passing of time due to differences in gravity or speed. Time travel, on the other hand, refers to the concept of physically traveling to a different point in time, which is currently not possible according to our current understanding of physics.