L lemnok New Member Joined Mar 10, 2013 Messages 13 Gender Undisclosed HSC 2010 Jul 11, 2017 #1 Colour index, CI = B - V Does B = the apparent or absolute magnitude through a blue filter? Does V = the apparent or absolute magnitude through a yellow-green filter?
Colour index, CI = B - V Does B = the apparent or absolute magnitude through a blue filter? Does V = the apparent or absolute magnitude through a yellow-green filter?
