The supermassive black holes that may be powering active galaxies emit only synchrotron radiation.
Indicate whether the statement is true or false
Question 2
The spectra of most galaxies show redshifts. This means that their spectral lines ________.
A) have wavelengths that are shorter than normal
B) always are in the red part of the visible spectrum
C) have wavelengths that are longer than normal
D) have a higher intensity in the red part of the spectrum
