is resolution measure in pixels per square inch? So is 1920 by 1080 that many pixels in a certain area or is it the entire screen?
Resolution is the number of pixels that make up the picture on your t.v. or computer screen. 1920x1080 means that there are 1,920 individual colored points of light across your screen's width and 1,080 across its height for a total of 2,073,600 pixels. Each pixel is capable of changing color as needed to display images on your screen. The higher the screen's resolution, the clearer the images it can display.