MacBook Air to G5 monitor
I want to connect a flat screen monitor from my old (2003) G5 Tower to my new (2012) MacBook Air. What connector(s) do I need?
PowerBook
I'm not sure what connection your monitor has but the normal method is to use a MiniDisplayport to xxx adapter. xxx can be DVI, VGA, HDMI etc. The MiniDisplay port adapter plugs into the Thunderbolt port.
These adapters are available in the store, here's a sample of the DVI adapter.
http://store.apple.com/us/product/MB570Z/A/mini-displayport-to-dvi-adapter