Fri 17-Feb-12 01:01 AM | edited Fri 17-Feb-12 01:01 AM by LMMiller9
An easy way to think about it is to think about a television screen.
Let's say that you don't have HiDef reception. In one room you have a small 12" tube tv. When you look at the picture you don't see much grain or detail. In the other room you have a new 55" LED Hidef TV receiving the same image. The image will look terrible on the new 55" tv because it expands every detail of the received image.
Well the 55" tv is like the 36mgpxls and the old 12" tv is like a 12 megapixel sensor. The larger one is "less forgiving" because it makes visible every imperfection in the signal received or the image projected onto the sensor by the lens.