Experience Per Mob

[eqravenprince]

I'm level 41 killing level 30 blue con mobs. I assume the mob turns green at 42, but still gives experience. So does that mean the mob gives only 50% of the experience it was giving at 41 cause it now cons green at 42? Also, how long does a mob continue to give experience? It is 1.5 times your level, so a level 40 mob will give experience all the way to 60?