What is indicated by the contrast ratio of a monitor?

What is indicated by the contrast ratio of a monitor?

• the difference in the intensity of light between the brightest white and darkest black that can be displayed
• how often the picture image is refreshed
• the total number of pixels that make up the picture
• the ratio of the horizontal and vertical viewing areas of the monitor
  

  Explanation: Contrast ratio is one of many factors that is used to describe the resolution of a monitor. Contrast ratio is a measure of the difference in intensity between white and black areas of the picture. A higher contrast ratio means the monitor can produce pictures with brighter whites and darker blacks.