FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -These dots are called Defective pixels (quoted from Wikipedia)". These dots may or may not stand out according to the colors displayed. It is a characteristic of LCDs and are not a defect and cannot be completely avoided with todays manufacturing technology.

Detailed explanation-2: -The number of pixels displayed per unit of length in an image is called the image resolution, usually measured in pixels per inch (ppi). The number of pixels or dots displayed per unit of length on the monitor constitutes the monitor resolution, usually measured in dots per inch (dpi).

Detailed explanation-3: -Each pixel on a computer screen is composed of three small dots of compounds called phosphors surrounded by a black mask. The phosphors emit light when struck by the electron beams produced by the electron guns at the rear of the tube. The three separate phosphors produce red, green, and blue light, respectively.

Detailed explanation-4: -The short answer is NO! PPI stands for ‘Pixels Per Inch’ and DPI for ‘Dots Per Inch’ ‘ so a pixel is not a dot. Pixels relate to digital images as seen on your monitor and captured in your camera.