Color monitor has a grid pixels that are created from 3 RGB(red, green, blue) sub-pixels over its screen. The brightness of all these colors together(ranging from 0 to 255) will create a final color of a pixel you see displayed. For example if all 3 are set to 0 the displayed color in that pixel is black, when they are all set to 255, final color is white. The combination of 255 red and 0 on blue and green would cause the pixel to be red only, and so on. Image information is created in computer and then sent to monitor where are colors processed and are displayed on their respective coordinates, the pixels on various places on screen. Monochrome monitor works same way just it has only white colored pixels displaying brightness from black and gray to white.
Pixels
320 x 480 pixels typically would mean that the display of the technological device, (probably a television, computer monitor, or other visual device. etc.) would have 320 pixels on the shortest side of the screen and 480 pixels on the adjacent side. Thus the screen would have 153600 total pixels in the screen, but by writing the dimensions, the manufacturer can keep better track of the brands and not be faced with two different dimensions equalling the same number of total pixels.
786432 pixels
In general, that is a relatively high definition photo. However, the thing that really determines what quality you need is the context. A question like this really can't be answered without any context.
resolution
it determines the resolution of the picture. the higher the pixels, the clearer the picture.
resolution
Resolution
Resolution. It determines the clarity and detail of the image on the screen. It is often represented by two numbers, such as 1920x1080, where the first number refers to the horizontal pixels and the second number refers to the vertical pixels.
Graphical Resolution or Display Resolution is the number of distinct pixels in each dimension that can be displayed.
pixels
The number of pixels that can be displayed The number of bits used to represent each pixel The dot pitch of the monitor
That means the your monitors resolution is 2400 pixels horizontally by 600 pixels vertically.
Colour monitors have pixels that are red, green and blue.
The measurements used to determine a monitors screen resolution is Pixels per Inch (PPI). The size of a monitor in inches and the total pixels in the horizontal and vertical directions determines the PPI of the screens resolution. For Example a 15 inch monitor has a maximum of 1024x768 pixel resolution.
Pixels per inch.