Digital theory

There's a lot of struggling with some of the technical ideas in digital photography, with both HNC and NC groups. 
It can be like learning a new and precise language, and there are no short cuts. 
Here are a set of useful explanations online:


http://www.shortcourses.com/sensors/ 


http://www.cambridgeincolour.com/learn-photography-concepts.htm 


http://electronics.howstuffworks.com/cameras-photography/digital/digital-camera3.htm 


http://www.luminous-landscape.com/tutorials/understanding-series/ 


http://www.luminous-landscape.com/tutorials/understanding-series/und_resolution.shtml 


http://www.bestprintingonline.com/resolution.htm#basics 


http://computer.howstuffworks.com/bytes.htm