gene1022:
I read a lot of posts on here where people talk about missing a shot by a pixel or two. I would like for someone to explain to me what, exactly is the size of a pixel. Would really like a serious answer to this question. Thanks
The serious answer is that it is a relative and not an absolute value. The actual size will depend on your screen size and resolution.
For example if you have say a 20inch wide monitor and are in fullscreen mode.
If your screen resolution is 800 x 600 then you will actually be looking at 800 pixels across 20 inches: pixel = 1/40 inch.
If your screen resolution is 1280 x 960 then you will actually be looking at 1280 pixels across 20 inches; pixel = 1/64 inch.
etc...
Foo