This monitor, running at the same 800 x 600 resolution will display images at about 75 pixels per inch. Two physically different sized monitors running at exactly the same display size will have different sized pixels. The exact same image will appear larger on a 800 x 600 screen than on a 1024 x 768 screen. Color Depth Color depth describes how many colors that can be displayed on a monitor's screen. Color depth is usually talked about in bits.
Computers speak a binary language of bits where there are only ones and zeros.
The more bit depth a color has, the more shades of that color can be displayed. Here, each color is 8 bits, for a total of 24 bits. Then the lack of a deeper color depth will show up as banding in the sky. You can also have less colors, such as 4 bit color with only 16 total colors, or 8 bit color with 256 total colors. Continuous tone images, such a normal photographs of daytime or astronomical subjects will usually look terrible at these low color depths because there are more real colors in the image than can be displayed.