Image adjustment - "exposure"

Can someone point me to where I can get some understanding about the actions under the 'exposure' adjustment....or provide the info? I find it easier to use a tool if I have some insight in how it works.

Thanks....JOHN

Have you checked your online documentation?

Here's a link to Adobe's LiveDoc for CS3 and the Exposure dialog < http://livedocs.adobe.com/en_US/Photoshop/10.0/help.html?con tent=WSA0E099D7-EB39-40f5-A99E-2F95526904CC.html>.

Here's a link to a video tutorial. <http://microstockpix.com/tuts/expose/expose.html>

Thanks, Wolf. I had searched but (stupidly) did not read that due to title referring to HDR.

Also, Thanks Michael for the link.

John