Question

what is pixel and resolution

Answer 1

The pixel (a word invented from "picture element") is the basic unit of programmable color on a computer display or in a computer image. Think of it as a logical - rather than a physical - unit. The physical size of a pixel depends on how you've set the resolution for the display screen.

resolution is the number of pixels (individual points of color) contained on a display monitor, expressed in terms of the number of pixels on the horizontal axis and the number on the vertical axis. The sharpness of the image on a display depends on the resolution and the size of the monitor.

Answer 2

Pixels are also measured in terms of DPI (dots per inch) or PPI (pixels per inch) and it is this measurement that affects resolution. The more DPI or PPI, the higher the image resolution. ... A key selling point of digital cameras is the number of pixels a camera can capture